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Loans, Impaired Loans, Average Investments in Impaired Loans, and Interest Income Recognized on Impaired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Loans with a specific valuation allowance [Abstract] |  |  |  |  |  |
Specific Allowance |  | $ 1,463 | $ 1,895 | $ 1,463 | $ 1,895 | $ 1,742
Total impaired loans [Abstract] |  |  |  |  |  |
Recorded balance |  | 50,173 | 66,178 | 50,173 | 66,178 | 59,068
Unpaid Contractual Principal Balance |  | 53,503 | 69,206 | 53,503 | 69,206 | 62,508
Specific Allowance |  | 1,463 | 1,895 | 1,463 | 1,895 | 1,742
Average Investment in Impaired Loans |  | 51,162 | 66,817 | 54,209 | 66,730 | 66,358
Interest Income Recognized | [1] | 506 | 689 | 941 | 1,132 | 2,233
Commercial [Member] | Construction [Member] |  |  |  |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |  |  |  |
Recorded Balance |  | 5,211 | 5,270 | 5,211 | 5,270 | 5,653
Unpaid Contractual Principal Balance |  | 5,211 | 5,271 | 5,211 | 5,271 | 5,654
Average Investment in Impaired Loans |  | 5,266 | 5,291 | 5,282 | 5,366 | 5,415
Interest Income Recognized | [1] | 68 | 78 | 119 | 128 | 205
Loans with a specific valuation allowance [Abstract] |  |  |  |  |  |
Recorded Balance |  | 3,500 | 4,285 | 3,500 | 4,285 | 3,974
Unpaid Contractual Principal Balance |  | 3,500 | 4,285 | 3,500 | 4,285 | 3,974
Specific Allowance |  | 719 | 734 | 719 | 734 | 734
Average Investment in Impaired Loans |  | 3,796 | 4,285 | 3,846 | 4,299 | 4,216
Interest Income Recognized | [1] | 0 | 0 | 0 | 0 | 0
Total impaired loans [Abstract] |  |  |  |  |  |
Recorded balance |  | 8,711 | 9,555 | 8,711 | 9,555 | 9,627
Unpaid Contractual Principal Balance |  | 8,711 | 9,556 | 8,711 | 9,556 | 9,628
Specific Allowance |  | 719 | 734 | 719 | 734 | 734
Average Investment in Impaired Loans |  | 9,062 | 9,576 | 9,128 | 9,665 | 9,631
Interest Income Recognized | [1] | 68 | 78 | 119 | 128 | 205
Commercial [Member] | Real Estate [Member] |  |  |  |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |  |  |  |
Recorded Balance |  | 29,951 | 33,504 | 29,951 | 33,504 | 31,639
Unpaid Contractual Principal Balance |  | 31,340 | 34,523 | 31,340 | 34,523 | 33,268
Average Investment in Impaired Loans |  | 30,366 | 33,687 | 30,179 | 35,051 | 34,650
Interest Income Recognized | [1] | 359 | 332 | 669 | 597 | 1,180
Loans with a specific valuation allowance [Abstract] |  |  |  |  |  |
Recorded Balance |  | 2,377 | 3,968 | 2,377 | 3,968 | 2,718
Unpaid Contractual Principal Balance |  | 2,560 | 4,272 | 2,560 | 4,272 | 2,876
Specific Allowance |  | 529 | 1,077 | 529 | 1,077 | 827
Average Investment in Impaired Loans |  | 2,452 | 3,973 | 2,946 | 4,330 | 4,376
Interest Income Recognized | [1] | 0 | 0 | 1 | 4 | 11
Total impaired loans [Abstract] |  |  |  |  |  |
Recorded balance |  | 32,328 | 37,472 | 32,328 | 37,472 | 34,357
Unpaid Contractual Principal Balance |  | 33,900 | 38,795 | 33,900 | 38,795 | 36,144
Specific Allowance |  | 529 | 1,077 | 529 | 1,077 | 827
Average Investment in Impaired Loans |  | 32,818 | 37,660 | 33,125 | 39,381 | 39,026
Interest Income Recognized | [1] | 359 | 332 | 670 | 601 | 1,191
Commercial [Member] | Other [Member] |  |  |  |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |  |  |  |
Recorded Balance |  | 7,262 | 16,947 | 7,262 | 16,947 | 13,069
Unpaid Contractual Principal Balance |  | 8,898 | 18,527 | 8,898 | 18,527 | 14,597
Average Investment in Impaired Loans |  | 7,367 | 17,362 | 10,118 | 15,843 | 15,663
Interest Income Recognized | [1] | 67 | 257 | 128 | 371 | 783
Loans with a specific valuation allowance [Abstract] |  |  |  |  |  |
Recorded Balance |  | 687 | 339 | 687 | 339 | 738
Unpaid Contractual Principal Balance |  | 809 | 463 | 809 | 463 | 862
Specific Allowance |  | 215 | 84 | 215 | 84 | 181
Average Investment in Impaired Loans |  | 729 | 353 | 794 | 396 | 531
Interest Income Recognized | [1] | 0 | 0 | 0 | 0 | 1
Total impaired loans [Abstract] |  |  |  |  |  |
Recorded balance |  | 7,949 | 17,286 | 7,949 | 17,286 | 13,807
Unpaid Contractual Principal Balance |  | 9,707 | 18,990 | 9,707 | 18,990 | 15,459
Specific Allowance |  | 215 | 84 | 215 | 84 | 181
Average Investment in Impaired Loans |  | 8,096 | 17,715 | 10,912 | 16,239 | 16,194
Interest Income Recognized | [1] | 67 | 257 | 128 | 371 | 784
Residential [Member] | Real Estate [Member] |  |  |  |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |  |  |  |
Recorded Balance |  | 1,185 | 1,865 | 1,185 | 1,865 | 1,277
Unpaid Contractual Principal Balance |  | 1,185 | 1,865 | 1,185 | 1,865 | 1,277
Average Investment in Impaired Loans |  | 1,186 | 1,866 | 1,044 | 1,445 | 1,507
Interest Income Recognized | [1] | 12 | 22 | 24 | 32 | 53
Loans with a specific valuation allowance [Abstract] |  |  |  |  |  |
Specific Allowance |  | 0 | 0 | 0 | 0 | 0
Total impaired loans [Abstract] |  |  |  |  |  |
Recorded balance |  | 1,185 | 1,865 | 1,185 | 1,865 | 1,277
Unpaid Contractual Principal Balance |  | 1,185 | 1,865 | 1,185 | 1,865 | 1,277
Specific Allowance |  | 0 | 0 | 0 | 0 | 0
Average Investment in Impaired Loans |  | 1,186 | 1,866 | 1,044 | 1,445 | 1,507
Interest Income Recognized | [1] | $ 12 | $ 22 | $ 24 | $ 32 | $ 53
[1] | Cash basis interest is substantially the same as interest income recognized.

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