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Loans, Impaired Loans, Average Investments in Impaired Loans, and Interest Income Recognized on Impaired Loans (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Total impaired loans [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded balance | $ 66,178 |  | $ 63,418 |  | $ 66,178 |  | $ 63,418 |  | $ 65,300 |
Unpaid Contractual Principal Balance | 69,206 |  | 69,876 |  | 69,206 |  | 69,876 |  | 68,228 |
Specific Allowance | 1,895 |  | 3,839 |  | 1,895 |  | 3,839 |  | 2,296 |
Average investment in impaired loans | 66,817 |  | 63,648 |  | 66,730 |  | 64,993 |  | 64,890 |
Interest Income Recognized | 689 | [1] | 457 | [1] | 1,132 | [1] | 989 | [1] | 2,083 | [1]
Commercial Construction [Member] |  |  |  |  |  |  |  |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded Balance | 5,270 |  | 5,921 |  | 5,270 |  | 5,921 |  | 5,457 |
Unpaid Contractual Principal Balance | 5,271 |  | 6,498 |  | 5,271 |  | 6,498 |  | 5,458 |
Specific Allowance | 0 |  | 0 |  | 0 |  | 0 |  | 0 |
Average Investment in Impaired Loans | 5,291 |  | 6,043 |  | 5,366 |  | 5,634 |  | 5,595 |
Interest Income Recognized | 78 | [1] | 53 | [1] | 128 | [1] | 127 | [1] | 240 | [1]
Loans with a specific valuation allowance [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded Balance | 4,285 |  | 4,655 |  | 4,285 |  | 4,655 |  | 4,353 |
Unpaid Contractual Principal Balance | 4,285 |  | 5,511 |  | 4,285 |  | 5,511 |  | 4,359 |
Specific Allowance | 734 |  | 1,890 |  | 734 |  | 1,890 |  | 1,189 |
Average Investment in Impaired Loans | 4,285 |  | 4,656 |  | 4,299 |  | 5,366 |  | 4,935 |
Interest income recognized | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1]
Total impaired loans [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded balance | 9,555 |  | 10,576 |  | 9,555 |  | 10,576 |  | 9,810 |
Unpaid Contractual Principal Balance | 9,556 |  | 12,009 |  | 9,556 |  | 12,009 |  | 9,817 |
Specific Allowance | 734 |  | 1,890 |  | 734 |  | 1,890 |  | 1,189 |
Average investment in impaired loans | 9,576 |  | 10,699 |  | 9,665 |  | 11,000 |  | 10,530 |
Interest Income Recognized | 78 | [1] | 53 | [1] | 128 | [1] | 127 | [1] | 240 | [1]
Commercial Secured by Real Estate [Member] |  |  |  |  |  |  |  |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded Balance | 33,504 |  | 29,232 |  | 33,504 |  | 29,232 |  | 35,258 |
Unpaid Contractual Principal Balance | 34,523 |  | 30,155 |  | 34,523 |  | 30,155 |  | 36,173 |
Specific Allowance | 0 |  | 0 |  | 0 |  | 0 |  | 0 |
Average Investment in Impaired Loans | 33,687 |  | 29,422 |  | 35,051 |  | 31,665 |  | 32,472 |
Interest Income Recognized | 332 | [1] | 236 | [1] | 597 | [1] | 533 | [1] | 1,231 | [1]
Loans with a specific valuation allowance [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded Balance | 3,968 |  | 6,194 |  | 3,968 |  | 6,194 |  | 4,039 |
Unpaid Contractual Principal Balance | 4,272 |  | 6,448 |  | 4,272 |  | 6,448 |  | 4,326 |
Specific Allowance | 1,077 |  | 1,866 |  | 1,077 |  | 1,866 |  | 1,005 |
Average Investment in Impaired Loans | 3,973 |  | 6,298 |  | 4,330 |  | 5,232 |  | 5,033 |
Interest income recognized | 0 | [1] | 0 | [1] | 4 | [1] | 0 | [1] | 1 | [1]
Total impaired loans [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded balance | 37,472 |  | 35,426 |  | 37,472 |  | 35,426 |  | 39,297 |
Unpaid Contractual Principal Balance | 38,795 |  | 36,603 |  | 38,795 |  | 36,603 |  | 40,499 |
Specific Allowance | 1,077 |  | 1,866 |  | 1,077 |  | 1,866 |  | 1,005 |
Average investment in impaired loans | 37,660 |  | 35,720 |  | 39,381 |  | 36,897 |  | 37,505 |
Interest Income Recognized | 332 | [1] | 236 | [1] | 601 | [1] | 533 | [1] | 1,232 | [1]
Commercial Other [Member] |  |  |  |  |  |  |  |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded Balance | 16,947 |  | 16,036 |  | 16,947 |  | 16,036 |  | 14,839 |
Unpaid Contractual Principal Balance | 18,527 |  | 19,760 |  | 18,527 |  | 19,760 |  | 16,435 |
Specific Allowance | 0 |  | 0 |  | 0 |  | 0 |  | 0 |
Average Investment in Impaired Loans | 17,362 |  | 15,825 |  | 15,843 |  | 15,630 |  | 15,396 |
Interest Income Recognized | 257 | [1] | 151 | [1] | 371 | [1] | 305 | [1] | 568 | [1]
Loans with a specific valuation allowance [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded Balance | 339 |  | 353 |  | 339 |  | 353 |  | 330 |
Unpaid Contractual Principal Balance | 463 |  | 477 |  | 463 |  | 477 |  | 453 |
Specific Allowance | 84 |  | 83 |  | 84 |  | 83 |  | 102 |
Average Investment in Impaired Loans | 353 |  | 379 |  | 396 |  | 624 |  | 525 |
Interest income recognized | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1] | 0 | [1]
Total impaired loans [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded balance | 17,286 |  | 16,389 |  | 17,286 |  | 16,389 |  | 15,169 |
Unpaid Contractual Principal Balance | 18,990 |  | 20,237 |  | 18,990 |  | 20,237 |  | 16,888 |
Specific Allowance | 84 |  | 83 |  | 84 |  | 83 |  | 102 |
Average investment in impaired loans | 17,715 |  | 16,204 |  | 16,239 |  | 16,254 |  | 15,921 |
Interest Income Recognized | 257 | [1] | 151 | [1] | 371 | [1] | 305 | [1] | 568 | [1]
Real Estate Mortgage [Member] |  |  |  |  |  |  |  |  |  |
Loans without a specific valuation allowance [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded Balance | 1,865 |  | 1,027 |  | 1,865 |  | 1,027 |  | 1,024 |
Unpaid Contractual Principal Balance | 1,865 |  | 1,027 |  | 1,865 |  | 1,027 |  | 1,024 |
Specific Allowance | 0 |  | 0 |  | 0 |  | 0 |  | 0 |
Average Investment in Impaired Loans | 1,866 |  | 1,025 |  | 1,445 |  | 842 |  | 934 |
Interest Income Recognized | 22 | [1] | 17 | [1] | 32 | [1] | 24 | [1] | 43 | [1]
Total impaired loans [Abstract] |  |  |  |  |  |  |  |  |  |
Recorded balance | 1,865 |  | 1,027 |  | 1,865 |  | 1,027 |  | 1,024 |
Unpaid Contractual Principal Balance | 1,865 |  | 1,027 |  | 1,865 |  | 1,027 |  | 1,024 |
Specific Allowance | 0 |  | 0 |  | 0 |  | 0 |  | 0 |
Average investment in impaired loans | 1,866 |  | 1,025 |  | 1,445 |  | 842 |  | 934 |
Interest Income Recognized | $ 22 | [1] | $ 17 | [1] | $ 32 | [1] | $ 24 | [1] | $ 43 | [1]
[1] | Cash basis interest is substantially the same as interest income recognized.

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