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Loans and Allowance for Loan Losses (Details 3) (USD $) In Thousands, unless otherwise specified | Jun. 30, 2012 | Dec. 31, 2011 | Jun. 30, 2011
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Age analysis of past due loans segregated by class of loans |  |  |
30-89 Days Past Due | $ 14,523 |  | $ 12,030
90 Days and Greater | 7,175 |  | 7,964
Total Past Due Loans | 21,698 |  | 19,994
Current Loans | 3,043,741 |  | 2,841,850
Total Loans | 3,065,439 | 3,013,498 | 2,861,844
Accruing Loans 90 Days or More Past Due | 1,403 | 798 | 1,166
Non-residential real estate [Member] |  |  |
Age analysis of past due loans segregated by class of loans |  |  |
30-89 Days Past Due | 2,649 |  | 1,720
90 Days and Greater | 2,454 |  | 573
Total Past Due Loans | 5,103 |  | 2,293
Current Loans | 1,135,948 |  | 978,409
Total Loans | 1,141,051 |  | 980,702
Accruing Loans 90 Days or More Past Due | 285 |  | 1
Residential real estate [Member] |  |  |
Age analysis of past due loans segregated by class of loans |  |  |
30-89 Days Past Due | 4,240 |  | 2,617
90 Days and Greater | 1,288 |  | 2,208
Total Past Due Loans | 5,528 |  | 4,825
Current Loans | 715,621 |  | 684,344
Total Loans | 721,149 |  | 689,169
Accruing Loans 90 Days or More Past Due | 478 |  | 927
Non-consumer non-real estate [Member] |  |  |
Age analysis of past due loans segregated by class of loans |  |  |
30-89 Days Past Due | 1,285 |  | 1,474
90 Days and Greater | 244 |  | 324
Total Past Due Loans | 1,529 |  | 1,798
Current Loans | 695,887 |  | 710,640
Total Loans | 697,416 |  | 712,438
Accruing Loans 90 Days or More Past Due | 16 |  | 6
Consumer non-real estate [Member] |  |  |
Age analysis of past due loans segregated by class of loans |  |  |
30-89 Days Past Due | 2,002 |  | 1,822
90 Days and Greater | 183 |  | 173
Total Past Due Loans | 2,185 |  | 1,995
Current Loans | 198,242 |  | 196,583
Total Loans | 200,427 |  | 198,578
Accruing Loans 90 Days or More Past Due | 122 |  | 116
Other loans [Member] |  |  |
Age analysis of past due loans segregated by class of loans |  |  |
30-89 Days Past Due | 1,213 |  | 3,489
90 Days and Greater | 1,654 |  | 3,766
Total Past Due Loans | 2,867 |  | 7,255
Current Loans | 153,117 |  | 152,982
Total Loans | 155,984 |  | 160,237
Accruing Loans 90 Days or More Past Due | 102 |  | 89
Acquired loans [Member] |  |  |
Age analysis of past due loans segregated by class of loans |  |  |
30-89 Days Past Due | 3,134 |  | 908
90 Days and Greater | 1,352 |  | 920
Total Past Due Loans | 4,486 |  | 1,828
Current Loans | 144,926 |  | 118,892
Total Loans | 149,412 |  | 120,720
Accruing Loans 90 Days or More Past Due | $ 400 |  | $ 27

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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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