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Loans and Allowance for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
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Age analysis of past due loans segregated by class of loans |  |
30-89 Days Past Due | $ 16,153 | $ 32,969
90 Days and Greater | 5,820 | 6,767
Total Past Due Loans | 21,973 | 39,736
Current Loans | 3,220,454 | 2,973,762
Total Loans | 3,242,427 | 3,013,498
Accruing Loans 90 Days or More Past Due | 537 | 798
Non-residential real estate [Member] |  |
Age analysis of past due loans segregated by class of loans |  |
30-89 Days Past Due | 4,364 | 18,678
90 Days and Greater | 2,331 | 755
Total Past Due Loans | 6,695 | 19,433
Current Loans | 1,215,550 | 1,031,765
Total Loans | 1,222,245 | 1,051,198
Accruing Loans 90 Days or More Past Due | 64 |
Residential real estate [Member] |  |
Age analysis of past due loans segregated by class of loans |  |
30-89 Days Past Due | 4,664 | 4,760
90 Days and Greater | 1,213 | 1,769
Total Past Due Loans | 5,877 | 6,529
Current Loans | 749,056 | 688,094
Total Loans | 754,933 | 694,623
Accruing Loans 90 Days or More Past Due | 247 | 375
Non-consumer non-real estate [Member] |  |
Age analysis of past due loans segregated by class of loans |  |
30-89 Days Past Due | 1,672 | 2,424
90 Days and Greater | 298 | 252
Total Past Due Loans | 1,970 | 2,676
Current Loans | 783,153 | 724,014
Total Loans | 785,123 | 726,690
Accruing Loans 90 Days or More Past Due | 28 | 24
Consumer non-real estate [Member] |  |
Age analysis of past due loans segregated by class of loans |  |
30-89 Days Past Due | 2,624 | 2,416
90 Days and Greater | 179 | 254
Total Past Due Loans | 2,803 | 2,670
Current Loans | 218,944 | 197,546
Total Loans | 221,747 | 200,216
Accruing Loans 90 Days or More Past Due | 136 | 241
Other loans [Member] |  |
Age analysis of past due loans segregated by class of loans |  |
30-89 Days Past Due | 1,348 | 2,366
90 Days and Greater | 1,266 | 2,774
Total Past Due Loans | 2,614 | 5,140
Current Loans | 147,283 | 153,903
Total Loans | 149,897 | 159,043
Accruing Loans 90 Days or More Past Due |  | 60
Acquired loans [Member] |  |
Age analysis of past due loans segregated by class of loans |  |
30-89 Days Past Due | 1,481 | 2,325
90 Days and Greater | 533 | 963
Total Past Due Loans | 2,014 | 3,288
Current Loans | 106,468 | 178,440
Total Loans | 108,482 | 181,728
Accruing Loans 90 Days or More Past Due | $ 62 | $ 98

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- Definition Recorded investment in financing receivables that are 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5111-111524 + Details
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- Definition Financing receivables that are current. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7A -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953401-111524 + Details
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- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6375948&loc=d3e4428-111522 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 01-6 -Paragraph 13 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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