Fair Value Measurements (Financial Assets Measured at Fair Value on Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	$ 486,025	$ 528,038
U.S. Government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	33,541	32,788
Residential MBSs [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	58,729	60,149
Fair value measurements, recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	486,025	528,038
Fair value measurements, recurring [Member] | Quoted Prices in Active Markets for Identical Assets, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | Significant Other Observable Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	486,025	528,038
Fair value measurements, recurring [Member] | Significant Unobservable Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | U.S. Government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	33,541	32,788
Fair value measurements, recurring [Member] | U.S. Government agency securities [Member] | Quoted Prices in Active Markets for Identical Assets, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | U.S. Government agency securities [Member] | Significant Other Observable Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	33,541	32,788
Fair value measurements, recurring [Member] | U.S. Government agency securities [Member] | Significant Unobservable Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | Residential MBSs [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	58,729	60,149
Fair value measurements, recurring [Member] | Residential MBSs [Member] | Quoted Prices in Active Markets for Identical Assets, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | Residential MBSs [Member] | Significant Other Observable Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	58,729	60,149
Fair value measurements, recurring [Member] | Residential MBSs [Member] | Significant Unobservable Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | Collateralized Mortgage Obligations [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	363,519	405,009
Fair value measurements, recurring [Member] | Collateralized Mortgage Obligations [Member] | Quoted Prices in Active Markets for Identical Assets, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | Collateralized Mortgage Obligations [Member] | Significant Other Observable Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	363,519	405,009
Fair value measurements, recurring [Member] | Collateralized Mortgage Obligations [Member] | Significant Unobservable Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | Municipal Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	30,236	30,092
Fair value measurements, recurring [Member] | Municipal Securities [Member] | Quoted Prices in Active Markets for Identical Assets, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	0	0
Fair value measurements, recurring [Member] | Municipal Securities [Member] | Significant Other Observable Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	30,236	30,092
Fair value measurements, recurring [Member] | Municipal Securities [Member] | Significant Unobservable Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Securities available for sale	$ 0	$ 0