Fair Value Measurements (Fair Value Financial Assets Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	$ 310,743	$ 319,882
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	0	0
Interest rate swap derivatives	0	0
Assets, Fair Value Disclosure	0	0
Interest rate swap derivatives	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	310,743	319,882
Interest rate swap derivatives	5,138	4,828
Assets, Fair Value Disclosure	315,881	324,710
Interest rate swap derivatives	5,138	4,828
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment securities available-for-sale	0	0
Interest rate swap derivatives	0	0
Assets, Fair Value Disclosure	0	0
Interest rate swap derivatives	$ 0	$ 0