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Loans and Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | $ 50,415 | $ 55,964
Recorded Investment with Allowance | 45,230 | 51,175
Related Allowance | 4,378 | 4,932
Average Recorded Investment | 45,859 | 49,006
Non-residential real estate [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 27,949 | 28,420
Recorded Investment with Allowance | 26,417 | 27,558
Related Allowance | 2,185 | 2,235
Average Recorded Investment | 26,814 | 22,887
Residential real estate [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 6,079 | 6,185
Recorded Investment with Allowance | 5,472 | 5,695
Related Allowance | 1,337 | 1,432
Average Recorded Investment | 4,847 | 5,557
Non-consumer non-real estate [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 1,899 | 2,062
Recorded Investment with Allowance | 1,565 | 1,748
Related Allowance | 452 | 605
Average Recorded Investment | 2,249 | 1,664
Consumer non-real estate [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 441 | 567
Recorded Investment with Allowance | 421 | 477
Related Allowance | 96 | 65
Average Recorded Investment | 408 | 452
Other loans [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 3,736 | 1,880
Recorded Investment with Allowance | 3,094 | 1,524
Related Allowance | 267 | 320
Average Recorded Investment | 2,648 | 2,666
Acquired loans [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 10,311 | 16,850
Recorded Investment with Allowance | 8,261 | 14,173
Related Allowance | 41 | 275
Average Recorded Investment | $ 8,893 | $ 15,780

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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5258-111524 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953550-111524 + Details
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