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Allowance for Loan Losses Allowance for Loan Loss Activity by Class (Details) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | $ 12,720,000 | $ 12,954,000 | $ 12,500,000 | $ 13,000,000 | $ 13,000,000
Charge offs | 1,368,000 | 1,425,000 | 2,802,000 | 3,895,000 | 9,080,000
Recoveries | 118,000 | 55,000 | 272,000 | 379,000 | 745,000
Provision | 1,200,000 | 2,800,000 | 2,700,000 | 4,900,000 | 7,835,000
Ending balance | 12,670,000 | 14,384,000 | 12,670,000 | 14,384,000 | 12,500,000
Ending balance specifically evaluated for impairment | 3,006,000 | 4,177,000 | 3,006,000 | 4,177,000 | 3,539,000
Ending balance collectively evaluated for impairment | 9,664,000 | 10,207,000 | 9,664,000 | 10,207,000 | 8,961,000
Total | 866,071,000 | 881,814,000 | 866,071,000 | 881,814,000 | 869,284,000
Ending balance specifically evaluated for impairment | 46,331,000 | 43,374,000 | 46,331,000 | 43,374,000 | 45,744,000
Ending balance collectively evaluated for impairment | 819,740,000 | 838,440,000 | 819,740,000 | 838,440,000 | 823,540,000
Commercial Real Estate Portfolio Segment [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 5,879,000 | 5,862,000 | 5,865,000 | 5,659,000 | 5,659,000
Charge offs | 7,000 | 915,000 | 61,000 | 915,000 | 1,394,000
Recoveries | 0 | 1,000 | 0 | 1,000 | 13,000
Provision | (61,000) | 616,000 | 7,000 | 819,000 | 1,587,000
Ending balance | 5,811,000 | 5,564,000 | 5,811,000 | 5,564,000 | 5,865,000
Ending balance specifically evaluated for impairment | 1,510,000 | 1,133,000 | 1,510,000 | 1,133,000 | 1,523,000
Ending balance collectively evaluated for impairment | 4,301,000 | 4,431,000 | 4,301,000 | 4,431,000 | 4,342,000
Total | 251,799,000 | 253,193,000 | 251,799,000 | 253,193,000 | 251,335,000
Ending balance specifically evaluated for impairment | 17,332,000 | 13,795,000 | 17,332,000 | 13,795,000 | 15,774,000
Ending balance collectively evaluated for impairment | 234,467,000 | 239,398,000 | 234,467,000 | 239,398,000 | 235,561,000
Commercial Construction [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 1,064,000 | 704,000 | 1,359,000 | 658,000 | 658,000
Charge offs | 527,000 | 0 | 930,000 | 0 | 928,000
Recoveries | 0 | 0 | 0 | 246,000 | 246,000
Provision | 54,000 | 669,000 | 162,000 | 469,000 | 1,383,000
Ending balance | 591,000 | 1,373,000 | 591,000 | 1,373,000 | 1,359,000
Ending balance specifically evaluated for impairment | 266,000 | 787,000 | 266,000 | 787,000 | 969,000
Ending balance collectively evaluated for impairment | 325,000 | 586,000 | 325,000 | 586,000 | 390,000
Total | 18,641,000 | 33,072,000 | 18,641,000 | 33,072,000 | 22,417,000
Ending balance specifically evaluated for impairment | 1,819,000 | 3,619,000 | 1,819,000 | 3,619,000 | 3,354,000
Ending balance collectively evaluated for impairment | 16,822,000 | 29,453,000 | 16,822,000 | 29,453,000 | 19,063,000
Commercial Other [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 2,115,000 | 2,125,000 | 2,050,000 | 2,063,000 | 2,063,000
Charge offs | 233,000 | 160,000 | 521,000 | 2,162,000 | 3,215,000
Recoveries | 41,000 | 9,000 | 144,000 | 11,000 | 113,000
Provision | 649,000 | 502,000 | 899,000 | 2,564,000 | 3,089,000
Ending balance | 2,572,000 | 2,476,000 | 2,572,000 | 2,476,000 | 2,050,000
Ending balance specifically evaluated for impairment | 1,005,000 | 932,000 | 1,005,000 | 932,000 | 652,000
Ending balance collectively evaluated for impairment | 1,567,000 | 1,544,000 | 1,567,000 | 1,544,000 | 1,398,000
Total | 91,393,000 | 87,833,000 | 91,393,000 | 87,833,000 | 81,183,000
Ending balance specifically evaluated for impairment | 5,790,000 | 4,100,000 | 5,790,000 | 4,100,000 | 5,861,000
Ending balance collectively evaluated for impairment | 85,603,000 | 83,733,000 | 85,603,000 | 83,733,000 | 75,322,000
Municipal [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 18,000 | 19,000 | 18,000 | 19,000 | 19,000
Charge offs | 0 | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0 | 0
Provision | 0 | 0 | 0 | 0 | (1,000)
Ending balance | 18,000 | 19,000 | 18,000 | 19,000 | 18,000
Ending balance specifically evaluated for impairment | 0 | 0 | 0 | 0 | 0
Ending balance collectively evaluated for impairment | 18,000 | 19,000 | 18,000 | 19,000 | 18,000
Total | 14,885,000 | 16,089,000 | 14,885,000 | 16,089,000 | 14,704,000
Ending balance specifically evaluated for impairment | 0 | 0 | 0 | 0 | 0
Ending balance collectively evaluated for impairment | 14,885,000 | 16,089,000 | 14,885,000 | 16,089,000 | 14,704,000
Residential Term [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 1,113,000 | 1,236,000 | 1,109,000 | 1,159,000 | 1,159,000
Charge offs | 407,000 | 136,000 | 607,000 | 375,000 | 1,911,000
Recoveries | 34,000 | 1,000 | 36,000 | 2,000 | 110,000
Provision | 286,000 | 486,000 | 488,000 | 801,000 | 1,751,000
Ending balance | 1,026,000 | 1,587,000 | 1,026,000 | 1,587,000 | 1,109,000
Ending balance specifically evaluated for impairment | 218,000 | 966,000 | 218,000 | 966,000 | 395,000
Ending balance collectively evaluated for impairment | 808,000 | 621,000 | 808,000 | 621,000 | 714,000
Total | 374,522,000 | 368,876,000 | 374,522,000 | 368,876,000 | 379,447,000
Ending balance specifically evaluated for impairment | 19,695,000 | 19,052,000 | 19,695,000 | 19,052,000 | 19,444,000
Ending balance collectively evaluated for impairment | 354,827,000 | 349,824,000 | 354,827,000 | 349,824,000 | 360,003,000
Residential Construction [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 9,000 | 59,000 | 11,000 | 255,000 | 255,000
Charge offs | 0 | 118,000 | 0 | 118,000 | 389,000
Recoveries | 0 | 0 | 0 | 0 | 54,000
Provision | 0 | 117,000 | (2,000) | (79,000) | 91,000
Ending balance | 9,000 | 58,000 | 9,000 | 58,000 | 11,000
Ending balance specifically evaluated for impairment | 0 | 48,000 | 0 | 48,000 | 0
Ending balance collectively evaluated for impairment | 9,000 | 10,000 | 9,000 | 10,000 | 11,000
Total | 4,759,000 | 6,449,000 | 4,759,000 | 6,449,000 | 6,459,000
Ending balance specifically evaluated for impairment | 0 | 1,336,000 | 0 | 1,336,000 | 0
Ending balance collectively evaluated for impairment | 4,759,000 | 5,113,000 | 4,759,000 | 5,113,000 | 6,459,000
Home Equity [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 859,000 | 682,000 | 654,000 | 595,000 | 595,000
Charge offs | 69,000 | 0 | 431,000 | 49,000 | 688,000
Recoveries | 1,000 | 0 | 2,000 | 0 | 1,000
Provision | (54,000) | 127,000 | 512,000 | 263,000 | 746,000
Ending balance | 737,000 | 809,000 | 737,000 | 809,000 | 654,000
Ending balance specifically evaluated for impairment | 7,000 | 300,000 | 7,000 | 300,000 | 0
Ending balance collectively evaluated for impairment | 730,000 | 509,000 | 730,000 | 509,000 | 654,000
Total | 95,013,000 | 100,689,000 | 95,013,000 | 100,689,000 | 99,082,000
Ending balance specifically evaluated for impairment | 1,695,000 | 1,456,000 | 1,695,000 | 1,456,000 | 1,311,000
Ending balance collectively evaluated for impairment | 93,318,000 | 99,233,000 | 93,318,000 | 99,233,000 | 97,771,000
Consumer Portfolio Segment [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 574,000 | 568,000 | 592,000 | 584,000 | 584,000
Charge offs | 125,000 | 96,000 | 252,000 | 276,000 | 555,000
Recoveries | 42,000 | 44,000 | 90,000 | 119,000 | 208,000
Provision | 140,000 | 87,000 | 201,000 | 176,000 | 355,000
Ending balance | 631,000 | 603,000 | 631,000 | 603,000 | 592,000
Ending balance specifically evaluated for impairment | 0 | 11,000 | 0 | 11,000 | 0
Ending balance collectively evaluated for impairment | 631,000 | 592,000 | 631,000 | 592,000 | 592,000
Total | 15,059,000 | 15,613,000 | 15,059,000 | 15,613,000 | 14,657,000
Ending balance specifically evaluated for impairment | 0 | 16,000 | 0 | 16,000 | 0
Ending balance collectively evaluated for impairment | 15,059,000 | 15,597,000 | 15,059,000 | 15,597,000 | 14,657,000
Unallocated Financing Receivables [Member] |  |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |  |
Beginning balance | 1,089,000 | 1,699,000 | 842,000 | 2,008,000 | 2,008,000
Charge offs | 0 | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0 | 0
Provision | 186,000 | 196,000 | 433,000 | (113,000) | (1,166,000)
Ending balance | 1,275,000 | 1,895,000 | 1,275,000 | 1,895,000 | 842,000
Ending balance specifically evaluated for impairment | 0 | 0 | 0 | 0 | 0
Ending balance collectively evaluated for impairment | 1,275,000 | 1,895,000 | 1,275,000 | 1,895,000 | 842,000
Total | 0 | 0 | 0 | 0 | 0
Ending balance specifically evaluated for impairment | 0 | 0 | 0 | 0 | 0
Ending balance collectively evaluated for impairment | $ 0 | $ 0 | $ 0 | $ 0 | $ 0

X
- Definition Reflects the gross amount charged against earnings during the period as credit losses (bad debt expense) based on review of the loan and lease portfolio and application of the methodology for estimating credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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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- Definition Reflects a reduction in bad debt expense attributable to collections of loans and lease receivables which had previously been fully or partially charged off as bad debts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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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- Definition Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=7512638&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for 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 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph d -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 114 -Paragraph 20 -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. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 8, 9 -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. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph a(ii) -Chapter V -Subsection I -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 6 -Section L -Subsection 1 + Details
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- Definition Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. 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 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5074-111524 Reference 2: 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 3: 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. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher OTS -Name Federal Regulation (FR) -Number Title 12 -Section 563c.102 -Paragraph 8 -Subparagraph e -Chapter V -Subsection I -LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-DEP -Paragraph 116 -IssueDate 2006-05-01 -Chapter 8 -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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