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Loans Receivable and Allowance for Loan Losses (Impaired Loans and Related Interest Income by Loan Portfolio 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
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | $ 9,749,000 |  | $ 9,749,000 |  | $ 11,074,000
Impaired Financing Receivable, with Related Allowance, Recorded Investment |  |  |  |  | 551,000
Impaired Financing Receivable, Recorded Investment | 9,749,000 |  | 9,749,000 |  | 11,625,000
Unpaid Principal Balance, With no related allowance recorded | 9,784,000 |  | 9,784,000 |  | 11,120,000
Unpaid Principal Balance, With an allowance recorded |  |  |  |  | 551,000
Unpaid Principal Balance, Total | 9,784,000 |  | 9,784,000 |  | 11,701,000
Associated Allowance |  |  |  |  | 9,000
Average Recorded Investment, Total | 10,417,000 | 14,916,000 | 10,617,000 | 13,955,000 |
Interest Income Recognized, Total | 1,000 | 72,000 | 19,000 | 148,000 |
Financing Receivable, Modifications, Recorded Investment | 6,000,000 |  | 6,000,000 |  | 5,600,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down |  |  |  |  | 9,000
New Loans Identified as Troubled Debt Restructurings |  |  | 1,300,000 |  |
Residential Real Estate Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 250,000 |  | 250,000 |  | 270,000
Impaired Financing Receivable, Recorded Investment | 250,000 |  | 250,000 |  | 270,000
Unpaid Principal Balance, With no related allowance recorded | 259,000 |  | 259,000 |  | 286,000
Unpaid Principal Balance, Total | 259,000 |  | 259,000 |  | 286,000
Average Recorded Investment, Total | 252,000 | 275,000 | 258,000 | 289,000 |
Interest Income Recognized, Total | 1,000 | 1,000 | 2,000 | 2,000 |
Commercial Real Estate Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment | 9,499,000 |  | 9,499,000 |  | 10,494,000
Impaired Financing Receivable, with Related Allowance, Recorded Investment |  |  |  |  | 551,000
Impaired Financing Receivable, Recorded Investment | 9,499,000 |  | 9,499,000 |  | 11,045,000
Unpaid Principal Balance, With no related allowance recorded | 9,525,000 |  | 9,525,000 |  | 10,554,000
Unpaid Principal Balance, With an allowance recorded |  |  |  |  | 551,000
Unpaid Principal Balance, Total | 9,525,000 |  | 9,525,000 |  | 11,105,000
Associated Allowance |  |  |  |  | 9,000
Average Recorded Investment, Total | 9,856,000 | 13,536,000 | 10,359,000 | 13,666,000 |
Interest Income Recognized, Total |  | 71,000 | 17,000 | 146,000 |
Commercial Loans [Member] |  |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |  |
Impaired Financing Receivable, with No Related Allowance, Recorded Investment |  |  |  |  | 310,000
Impaired Financing Receivable, Recorded Investment |  |  |  |  | 310,000
Unpaid Principal Balance, With no related allowance recorded |  |  |  |  | 310,000
Unpaid Principal Balance, Total |  |  |  |  | 310,000
Average Recorded Investment, Total | $ 309,000 | $ 385,000 |  |  |

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- Definition Loans Identified as Troubled Debt Restructurings during the period. + References No definition available. + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Reflects the amount of the write-down related to a troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + 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 (c)(1) -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 310 -SubTopic 10 -Section 50 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5258-111524 + Details
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- Definition Amount of interest income recognized on a cash-basis method of accounting that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + 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 (c)(3) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 + Details
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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953550-111524 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + 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)(3) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 + Details
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- Definition Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses. + 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)(4) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 + Details
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- Definition Amount of investment in impaired financing receivables for which there is no related allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953550-111524 + Details
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