Note 11 - Disclosures About Fair Value of Financial Instruments - Financial Assets and Liabilities Measured on a Recurring Basis (Details) - USD ($)
$ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
| Time Deposits in Other Banks |
$ 18,946
|
$ 5,500
|
| Held to Maturity Securities |
41,156
|
42,437
|
| Available for Sale Securities |
488,067
|
496,859
|
| US States and Political Subdivisions Debt Securities [Member] |
|
|
| Held to Maturity Securities |
40,654
|
41,937
|
| Available for Sale Securities |
30,609
|
17,469
|
| Corporate Debt Securities [Member] |
|
|
| Held to Maturity Securities |
502
|
500
|
| Available for Sale Securities |
34,160
|
4,950
|
| US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
275,000
|
369,061
|
| Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
146,209
|
103,252
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
| Available for Sale Securities |
2,089
|
2,127
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
2,089
|
2,127
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
| Available for Sale Securities |
485,978
|
494,732
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Available for Sale Securities |
30,609
|
17,469
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] |
|
|
| Available for Sale Securities |
34,160
|
4,950
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
275,000
|
369,061
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
146,209
|
103,252
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
|
|
| Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Reported Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] |
|
|
| Cash and due from banks |
52,772
|
79,550
|
| Time Deposits in Other Banks |
18,946
|
5,500
|
| Federal Home Loan Bank Stock |
4,148
|
4,148
|
| Loans Held for Sale |
611
|
1,477
|
| Loans, net |
643,879
|
606,412
|
| Accrued Interest Receivable |
4,335
|
4,170
|
| Noninterest Bearing Deposits |
279,001
|
253,795
|
| Interest Bearings Deposits |
920,716
|
911,598
|
| Accrued Interest Payable |
57
|
108
|
| Repurchase Agreements |
|
15,000
|
| Reported Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Held to Maturity Securities |
40,241
|
40,782
|
| Available for Sale Securities |
30,609
|
17,469
|
| Reported Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] |
|
|
| Held to Maturity Securities |
500
|
500
|
| Available for Sale Securities |
34,160
|
4,950
|
| Reported Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
275,000
|
369,061
|
| Reported Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
146,209
|
|
| Reported Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] |
|
|
| Available for Sale Securities |
|
103,252
|
| Reported Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
2,089
|
2,127
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] |
|
|
| Cash and due from banks |
52,772
|
79,550
|
| Time Deposits in Other Banks |
18,940
|
5,465
|
| Federal Home Loan Bank Stock |
4,148
|
4,148
|
| Loans Held for Sale |
623
|
1,508
|
| Loans, net |
642,908
|
613,397
|
| Accrued Interest Receivable |
4,335
|
4,170
|
| Noninterest Bearing Deposits |
279,001
|
253,795
|
| Interest Bearings Deposits |
922,187
|
913,410
|
| Accrued Interest Payable |
57
|
108
|
| Repurchase Agreements |
|
15,253
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Held to Maturity Securities |
40,654
|
41,937
|
| Available for Sale Securities |
30,609
|
17,469
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] |
|
|
| Held to Maturity Securities |
502
|
500
|
| Available for Sale Securities |
34,160
|
4,950
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
275,000
|
369,061
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
146,209
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] |
|
|
| Available for Sale Securities |
|
103,252
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
2,089
|
2,127
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |
|
|
| Cash and due from banks |
52,772
|
79,550
|
| Time Deposits in Other Banks |
|
|
| Federal Home Loan Bank Stock |
|
|
| Loans Held for Sale |
|
|
| Loans, net |
|
|
| Accrued Interest Receivable |
|
|
| Noninterest Bearing Deposits |
279,001
|
253,795
|
| Interest Bearings Deposits |
|
|
| Accrued Interest Payable |
|
|
| Repurchase Agreements |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Held to Maturity Securities |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Corporate Debt Securities [Member] |
|
|
| Held to Maturity Securities |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Backed Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
2,089
|
2,127
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |
|
|
| Cash and due from banks |
|
|
| Time Deposits in Other Banks |
18,940
|
5,465
|
| Federal Home Loan Bank Stock |
4,148
|
4,148
|
| Loans Held for Sale |
|
|
| Loans, net |
|
|
| Accrued Interest Receivable |
|
|
| Noninterest Bearing Deposits |
|
|
| Interest Bearings Deposits |
922,187
|
913,410
|
| Accrued Interest Payable |
|
|
| Repurchase Agreements |
|
15,253
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Held to Maturity Securities |
3,153
|
3,805
|
| Available for Sale Securities |
30,609
|
17,469
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Corporate Debt Securities [Member] |
|
|
| Held to Maturity Securities |
502
|
500
|
| Available for Sale Securities |
34,160
|
4,950
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
275,000
|
369,061
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
146,209
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Backed Securities [Member] |
|
|
| Available for Sale Securities |
|
103,252
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |
|
|
| Cash and due from banks |
|
|
| Time Deposits in Other Banks |
|
|
| Federal Home Loan Bank Stock |
|
|
| Loans Held for Sale |
623
|
1,508
|
| Loans, net |
642,908
|
613,397
|
| Accrued Interest Receivable |
4,335
|
4,170
|
| Noninterest Bearing Deposits |
|
|
| Interest Bearings Deposits |
|
|
| Accrued Interest Payable |
57
|
108
|
| Repurchase Agreements |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US States and Political Subdivisions Debt Securities [Member] |
|
|
| Held to Maturity Securities |
37,501
|
38,132
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Corporate Debt Securities [Member] |
|
|
| Held to Maturity Securities |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | US Treasury and Government [Member] |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Backed Securities [Member] |
|
|
| Available for Sale Securities |
|
|
| Estimate of Fair Value Measurement [Member] | Fair Value, Measurements, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member] |
|
|
| Available for Sale Securities |
|
|