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Allowance for Loan Losses (Details 1) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 | Jun. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Dec. 31, 2011
--- | --- | --- | --- | --- | --- | ---
Ending Balance Attributable to Loans |  |  |  |  |  |
Individually evaluated for impairment | $ 5,510 |  | $ 7,373 |  |  |
Collectively evaluated for impairment | 15,498 |  | 14,337 |  |  |
Acquired with deteriorated credit quality | 996 |  | 248 |  |  |
Ending Balance | 22,004 | 22,133 | 21,958 | 21,457 | 20,092 | 19,241
Loans |  |  |  |  |  |
Individually evaluated for impairment | 24,967 |  | 30,694 |  |  |
Collectively evaluated for impairment | 1,780,028 |  | 1,814,229 |  |  |
Acquired with deteriorated credit quality | 12,878 |  | 17,009 |  |  |
Total | 1,817,873 |  | 1,861,932 |  |  |
Commercial |  |  |  |  |  |
Ending Balance Attributable to Loans |  |  |  |  |  |
Individually evaluated for impairment | 5,510 |  | 3,453 |  |  |
Collectively evaluated for impairment | 7,698 |  | 7,286 |  |  |
Acquired with deteriorated credit quality | 810 |  | 248 |  |  |
Ending Balance | 14,018 | 14,531 | 10,987 | 13,407 | 13,190 | 12,119
Loans |  |  |  |  |  |
Individually evaluated for impairment | 24,741 |  | 23,721 |  |  |
Collectively evaluated for impairment | 1,028,446 |  | 1,056,861 |  |  |
Acquired with deteriorated credit quality | 10,142 |  | 13,582 |  |  |
Total | 1,063,329 |  | 1,094,164 |  |  |
Residential |  |  |  |  |  |
Ending Balance Attributable to Loans |  |  |  |  |  |
Individually evaluated for impairment | 0 |  | 3,920 |  |  |
Collectively evaluated for impairment | 1,254 |  | 1,506 |  |  |
Acquired with deteriorated credit quality | 186 |  | 0 |  |  |
Ending Balance | 1,440 | 1,592 | 5,426 | 3,373 | 2,124 | 2,728
Loans |  |  |  |  |  |
Individually evaluated for impairment | 226 |  | 6,973 |  |  |
Collectively evaluated for impairment | 481,064 |  | 487,486 |  |  |
Acquired with deteriorated credit quality | 2,736 |  | 3,421 |  |  |
Total | 484,026 |  | 497,880 |  |  |
Consumer |  |  |  |  |  |
Ending Balance Attributable to Loans |  |  |  |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |  |
Collectively evaluated for impairment | 3,625 |  | 3,879 |  |  |
Acquired with deteriorated credit quality | 0 |  | 0 |  |  |
Ending Balance | 3,625 | 3,637 | 3,879 | 3,558 | 3,744 | 3,889
Loans |  |  |  |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |  |
Collectively evaluated for impairment | 270,518 |  | 269,882 |  |  |
Acquired with deteriorated credit quality | 0 |  | 6 |  |  |
Total | 270,518 |  | 269,888 |  |  |
Unallocated |  |  |  |  |  |
Ending Balance Attributable to Loans |  |  |  |  |  |
Individually evaluated for impairment | 0 |  | 0 |  |  |
Collectively evaluated for impairment | 2,921 |  | 1,666 |  |  |
Acquired with deteriorated credit quality | 0 |  | 0 |  |  |
Ending Balance | $ 2,921 | $ 2,373 | $ 1,666 | $ 1,119 | $ 1,034 | $ 505

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- Definition The balance of financing receivables that were acquired with deteriorated credit quality. + 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=28368275&loc=SL6953423-111524 + Details
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- Definition The valuation allowance for financing receivables acquired with deteriorated credit quality. + 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=28368275&loc=SL6953423-111524 + 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=28368275&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=28368275&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 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 4: 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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