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Fair Value Measurements - Recurring and Nonrecurring (Details) (USD $) | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Mar. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2013 | Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | $ 441,223,000 |  | $ 441,223,000 |  |  | $ 443,224,000 |  |
Valuation allowance | 7,307,000 | 9,601,000 | 7,307,000 | 9,601,000 | 8,321,000 | 9,208,000 | 9,489,000 | 10,133,000
Provision for credit losses | (400,000) | 0 | (400,000) | 0 |  |  |  |
Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loans, charge-offs | 287,000 |  | 308,000 |  |  |  |  |
Carrying Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 441,223,000 |  | 441,223,000 |  |  | 443,224,000 |  |
Loans receivable | 537,848,000 |  | 537,848,000 |  |  | 503,149,000 |  |
Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 7,633,000 |  | 7,633,000 |  |  | 7,514,000 |  |
Loans receivable | 0 |  | 0 |  |  | 0 |  |
Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 433,590,000 |  | 433,590,000 |  |  | 435,710,000 |  |
Loans receivable | 0 |  | 0 |  |  | 0 |  |
Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
Loans receivable | 540,215,000 |  | 540,215,000 |  |  | 507,361,000 |  |
Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 441,223,000 |  | 441,223,000 |  |  | 443,224,000 |  |
Loans receivable | 540,215,000 |  | 540,215,000 |  |  | 507,361,000 |  |
Nonrecurring | Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Assets, fair value | 0 |  | 0 |  |  | 0 |  |
Nonrecurring | Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Assets, fair value | 0 |  | 0 |  |  | 0 |  |
Nonrecurring | Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Assets, fair value | 145,000 |  | 145,000 |  |  | 133,000 |  |
Nonrecurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Assets, fair value | 145,000 |  | 145,000 |  |  | 133,000 |  |
Recurring | Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Assets, fair value | 7,633,000 |  | 7,633,000 |  |  | 7,514,000 |  |
Recurring | Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Assets, fair value | 433,590,000 |  | 433,590,000 |  |  | 435,710,000 |  |
Recurring | Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Assets, fair value | 0 |  | 0 |  |  | 0 |  |
Recurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Assets, fair value | 441,223,000 |  | 441,223,000 |  |  | 443,224,000 |  |
U.S. Government agencies | Recurring | Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
U.S. Government agencies | Recurring | Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 17,336,000 |  | 17,336,000 |  |  | 18,203,000 |  |
U.S. Government agencies | Recurring | Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
U.S. Government agencies | Recurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 17,336,000 |  | 17,336,000 |  |  | 18,203,000 |  |
Obligations of states and political subdivisions | Recurring | Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
Obligations of states and political subdivisions | Recurring | Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 137,117,000 |  | 137,117,000 |  |  | 158,407,000 |  |
Obligations of states and political subdivisions | Recurring | Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
Obligations of states and political subdivisions | Recurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 137,117,000 |  | 137,117,000 |  |  | 158,407,000 |  |
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 274,102,000 |  | 274,102,000 |  |  | 253,709,000 |  |
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
U.S. Government agencies collateralized by residential mortgage obligations | Recurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 274,102,000 |  | 274,102,000 |  |  | 253,709,000 |  |
Private label residential mortgage backed securities | Recurring | Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
Private label residential mortgage backed securities | Recurring | Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 5,035,000 |  | 5,035,000 |  |  | 5,391,000 |  |
Private label residential mortgage backed securities | Recurring | Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
Private label residential mortgage backed securities | Recurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 5,035,000 |  | 5,035,000 |  |  | 5,391,000 |  |
Other equity securities | Recurring | Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 7,633,000 |  | 7,633,000 |  |  | 7,514,000 |  |
Other equity securities | Recurring | Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
Other equity securities | Recurring | Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 0 |  | 0 |  |  | 0 |  |
Other equity securities | Recurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Available-for-sale investment securities | 7,633,000 |  | 7,633,000 |  |  | 7,514,000 |  |
Impaired loans | Nonrecurring | Carrying Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loans receivable | 174,000 |  | 174,000 |  |  | 194,000 |  |
Valuation allowance | 29,000 |  | 29,000 |  |  | 61,000 |  |
Impaired loans | Nonrecurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loans receivable | 145,000 |  | 145,000 |  |  | 133,000 |  |
Commercial |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Valuation allowance | 1,874,000 | 2,792,000 | 1,874,000 | 2,792,000 | 2,012,000 | 2,444,000 | 2,261,000 | 2,676,000
Real Estate Portfolio Segment |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Valuation allowance | 4,157,000 | 5,057,000 | 4,157,000 | 5,057,000 | 4,672,000 | 5,174,000 | 5,536,000 | 5,877,000
Consumer |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Valuation allowance | 981,000 | 1,252,000 | 981,000 | 1,252,000 | 1,391,000 | 1,168,000 | 1,315,000 | 1,541,000
Equity loans and lines of credit | Impaired loans | Nonrecurring | Level 1 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loans receivable | 0 |  | 0 |  |  | 0 |  |
Equity loans and lines of credit | Impaired loans | Nonrecurring | Level 2 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loans receivable | 0 |  | 0 |  |  | 0 |  |
Equity loans and lines of credit | Impaired loans | Nonrecurring | Level 3 |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loans receivable | 145,000 |  | 145,000 |  |  | 133,000 |  |
Equity loans and lines of credit | Impaired loans | Nonrecurring | Fair Value |  |  |  |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |  |  |  |
Loans receivable | $ 145,000 |  | $ 145,000 |  |  | $ 133,000 |  |

X
- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + 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 (a) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 Reference 2: 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 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 + Details
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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524 + Details
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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Glossary Loan -URI http://asc.fasb.org/extlink&oid=6517073 + Details
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- Definition Amount of expense related to estimated loss from loan and lease transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 9 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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