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Disclosures About Fair Value Measurements (Assets and Liabilities Measured on Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	$ 146,489	$ 151,538
U.S. Agency Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	6,903	5,911
U.S. Agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	130,613	137,735
Corporate Bond Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	8,973	7,892
Fair Value Measurements, Recurring Basis [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair value of swap asset	108	164
Fair value of swap liability	108	164
Fair Value Measurements, Recurring Basis [Member] | U.S. Agency Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	6,903	5,911
Fair Value Measurements, Recurring Basis [Member] | U.S. Agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	130,613	137,735
Fair Value Measurements, Recurring Basis [Member] | Corporate Bond Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	8,973	7,892
Fair Value Measurements, Recurring Basis [Member] | Level 1 [Member] | U.S. Agency Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale
Fair Value Measurements, Recurring Basis [Member] | Level 1 [Member] | U.S. Agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale
Fair Value Measurements, Recurring Basis [Member] | Level 1 [Member] | Corporate Bond Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale
Fair Value Measurements, Recurring Basis [Member] | Level 2 [Member] | U.S. Agency Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	6,903	5,911
Fair Value Measurements, Recurring Basis [Member] | Level 2 [Member] | U.S. Agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	130,613	137,735
Fair Value Measurements, Recurring Basis [Member] | Level 2 [Member] | Corporate Bond Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale	8,973	7,892
Fair Value Measurements, Recurring Basis [Member] | Level 3 [Member] | U.S. Agency Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale
Fair Value Measurements, Recurring Basis [Member] | Level 3 [Member] | U.S. Agency mortgage-backed securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale
Fair Value Measurements, Recurring Basis [Member] | Level 3 [Member] | Corporate Bond Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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