Loans and Related Allowance for Loan Losses (Average of Impaired Loans and Related Interest Income by Loan Portfolio Class) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
$ 30,322
|
$ 24,308
|
$ 27,734
|
$ 24,068
|
| Interest income recognized on an accrual basis |
219
|
167
|
506
|
510
|
| Interest income recognized on a cash basis |
4
|
2
|
12
|
32
|
| Commercial real estate- non owner-occupied [Member] |
|
|
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
10,210
|
4,607
|
5,903
|
4,314
|
| Interest income recognized on an accrual basis |
78
|
39
|
125
|
117
|
| Interest income recognized on a cash basis |
0
|
0
|
0
|
0
|
| Commercial real estate- all other CRE [Member] |
|
|
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
11,191
|
7,935
|
12,142
|
7,626
|
| Interest income recognized on an accrual basis |
55
|
34
|
135
|
89
|
| Interest income recognized on a cash basis |
4
|
0
|
8
|
8
|
| Acquisition and development- 1-4 family residential construction [Member] |
|
|
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
582
|
701
|
641
|
745
|
| Interest income recognized on an accrual basis |
6
|
8
|
21
|
26
|
| Interest income recognized on a cash basis |
0
|
0
|
0
|
0
|
| Acquisition and development- All other A&D [Member] |
|
|
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
1,997
|
5,091
|
2,933
|
5,311
|
| Interest income recognized on an accrual basis |
24
|
31
|
72
|
94
|
| Interest income recognized on a cash basis |
0
|
0
|
0
|
0
|
| Commercial and industrial [Member] |
|
|
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
1,119
|
1,253
|
1,095
|
1,471
|
| Interest income recognized on an accrual basis |
13
|
13
|
32
|
60
|
| Interest income recognized on a cash basis |
0
|
0
|
0
|
18
|
| Residential mortgage- term [Member] |
|
|
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
4,916
|
4,400
|
4,718
|
4,245
|
| Interest income recognized on an accrual basis |
43
|
42
|
121
|
124
|
| Interest income recognized on a cash basis |
0
|
2
|
4
|
4
|
| Residential mortgage- home equity [Member] |
|
|
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
307
|
321
|
302
|
349
|
| Interest income recognized on an accrual basis |
0
|
0
|
0
|
0
|
| Interest income recognized on a cash basis |
0
|
0
|
0
|
2
|
| Consumer [Member] |
|
|
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
|
|
| Average Investment |
0
|
0
|
0
|
7
|
| Interest income recognized on an accrual basis |
0
|
0
|
0
|
0
|
| Interest income recognized on a cash basis |
$ 0
|
$ 0
|
$ 0
|
$ 0
|