Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Securities available-for-sale (Before tax) [Abstract]
Change in unrealized gain during period	$ 1,574	$ (8,993)	$ 4,520	$ (10,108)
Reclassification adjustment for gains included in net income	(128)	0	(128)	(204)
Total other comprehensive income (loss), before tax	1,446	(8,993)	4,392	(10,312)
Securities available-for-sale: (Tax Effect) [Abstract]
Change in unrealized gain during period	(551)	3,148	(1,582)	3,538
Reclassification adjustment for gains included in net income	45	0	45	71
Total other comprehensive income (loss), tax effect	(506)	3,148	1,537	3,609
Securities available-for-sale (Net of Tax) [Abstract]
Change in unrealized gain during period	1,023	(5,845)	2,938	(6,570)
Reclassification adjustment for gains included in net income	(83)	0	(83)	(133)
Total other comprehensive income (loss), net of tax	940	(5,845)	2,855	(6,703)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Gain on securities, net	128	0	128	204
Tax expense	506	(3,148)	(1,537)	(3,609)
Net earnings	4,116	3,663	10,974	7,091
Unrealized Gains and Losses on Securities Available-for-Sale [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Securities available-for-sale: (Tax Effect) [Abstract]
Total other comprehensive income (loss), tax effect	(45)	0	(45)	(71)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Gain on securities, net	(128)	0	(128)	(204)
Tax expense	45	0	45	71
Net earnings	$ (83)	$ 0	$ (83)	$ (133)