Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
NET INCOME	$ 6,617	$ 5,489	$ 17,628	$ 15,913
OTHER COMPREHENSIVE INCOME, NET OF TAX:
Unrealized securities gains (losses) during period	1,118	1,220	(5,454)	2,174
Reclassification for gains included in net income	0	0	(329)	(177)
Change in pension liability, net	5	5	15	15
Other Comprehensive Income (Loss)	1,123	1,225	(5,768)	2,012
TOTAL COMPREHENSIVE INCOME (LOSS)	$ 7,740	$ 6,714	$ 11,860	$ 17,925