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Loans and Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | $ 49,972 | $ 24,426
Recorded Investment with Allowance | 45,173 | 21,187
Related Allowance | 4,492 | 3,014
Average Recorded Investment | 42,519 | 24,777
Non-residential real estate [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 28,098 | 9,311
Recorded Investment with Allowance | 26,682 | 8,576
Related Allowance | 2,211 | 952
Average Recorded Investment | 23,283 | 9,583
Residential real estate [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 5,469 | 5,526
Recorded Investment with Allowance | 4,913 | 4,798
Related Allowance | 1,328 | 1,331
Average Recorded Investment | 5,185 | 6,040
Non-consumer non-real estate [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 1,949 | 1,535
Recorded Investment with Allowance | 1,539 | 1,214
Related Allowance | 439 | 282
Average Recorded Investment | 1,641 | 1,584
Consumer non-real estate [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 419 | 196
Recorded Investment with Allowance | 398 | 161
Related Allowance | 87 | 24
Average Recorded Investment | 357 | 195
Other loans [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 2,957 | 3,345
Recorded Investment with Allowance | 2,561 | 3,247
Related Allowance | 344 | 405
Average Recorded Investment | 2,323 | 4,086
Acquired loans [Member] |  |
Impaired loans segregated by class of loans |  |
Unpaid Principal Balance | 11,080 | 4,513
Recorded Investment with Allowance | 9,080 | 3,191
Related Allowance | 83 | 20
Average Recorded Investment | $ 9,730 | $ 3,289

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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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