Commitments, Off-Balance Sheet Arrangements, and Contingent Liabilities (Details) - USD ($)
$ in Thousands |
3 Months Ended |
|
Mar. 31, 2018 |
Dec. 31, 2017 |
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
|
| Period of home equity loans available to the borrower |
|
10 years
|
|
| Maximum [Member] |
|
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
|
| Period of commitments for loans extended to customers |
|
90 days
|
|
| Period of construction loans available to the borrower |
|
1 year
|
|
| Commitments to Extend Credit Under Amortizing Loans [Member] |
|
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
|
| Off-balance sheet risks asset amount |
[1] |
$ 53,445
|
$ 31,543
|
| Probable losses |
|
0
|
0
|
| Commitments to Extend Credit Under Home Equity Lines of Credit [Member] |
|
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
|
| Off-balance sheet risks asset amount |
[2] |
15,080
|
14,972
|
| Probable losses |
|
0
|
0
|
| Unused Portion of Construction Loans [Member] |
|
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
|
| Off-balance sheet risks asset amount |
[3] |
24,194
|
17,097
|
| Unused Portion of Business Lines of Credit [Member] |
|
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
|
| Off-balance sheet risks asset amount |
|
16,078
|
16,878
|
| Standby Letters of Credit [Member] |
|
|
|
| Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |
|
|
|
| Off-balance sheet risks liability amount |
|
267
|
259
|
| Probable losses |
|
$ 0
|
$ 0
|
|
|