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Fair Value Measurements - Schedule of Fair Value of Assets Measured on Recurring Basis (Detail) (Fair Value, Measurements, Recurring [Member], USD $)
In Thousands, unless otherwise specified
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Mar. 31, 2014
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Dec. 31, 2013
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Available-for-sale Securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
$ 102,934 |
$ 101,722 |
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U.S. Treasury Security [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
996 |
997 |
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U.S. Government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
25,049 |
22,301 |
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Mortgage-backed securities of government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
52,996 |
54,535 |
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Asset-backed securities of government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
2,714 |
2,775 |
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State and political subdivisions [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
16,513 |
16,447 |
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Corporate bonds [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
4,540 |
4,539 |
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Total debt securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
102,808 |
101,594 |
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Equity securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
126 |
128 |
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Level I [Member] | Available-for-sale Securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
2,118 |
1,125 |
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Level I [Member] | U.S. Treasury Security [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
996 |
997 |
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Level I [Member] | U.S. Government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level I [Member] | Mortgage-backed securities of government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Total Assets |
|
|
|
Level I [Member] | Asset-backed securities of government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level I [Member] | State and political subdivisions [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level I [Member] | Corporate bonds [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level I [Member] | Total debt securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
996 |
997 |
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Level I [Member] | Equity securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
126 |
128 |
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Level II [Member] | Available-for-sale Securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
101,812 |
100,597 |
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Level II [Member] | U.S. Treasury Security [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level II [Member] | U.S. Government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
25,049 |
22,301 |
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Level II [Member] | Mortgage-backed securities of government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
52,996 |
54,535 |
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Level II [Member] | Asset-backed securities of government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
2,714 |
2,775 |
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Level II [Member] | State and political subdivisions [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
16,513 |
16,447 |
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Level II [Member] | Corporate bonds [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
4,540 |
4,539 |
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Level II [Member] | Total debt securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
101,812 |
100,597 |
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Level II [Member] | Equity securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level III [Member] | Available-for-sale Securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level III [Member] | U.S. Treasury Security [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level III [Member] | U.S. Government agencies [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level III [Member] | Mortgage-backed securities of government agencies [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
|
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Level III [Member] | Asset-backed securities of government agencies [Member]
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|
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
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| Total Assets |
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Level III [Member] | State and political subdivisions [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level III [Member] | Corporate bonds [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level III [Member] | Total debt securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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Level III [Member] | Equity securities [Member]
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| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
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| Total Assets |
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