Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 4,548	$ 1,694
Other comprehensive (loss) income:
Change in net actuarial gain	40	123
Tax effect on change in net actuarial gain	(14)	(43)
Unrealized holding (losses) gains arising during the period	(1,646)	8,898
Tax effect on unrealized holding gains arising during the period	576	(3,114)
Reclassification adjustment for gains included in net income	(185)	(1,176)
Tax effect on reclassification adjustment for gains included in net income tax expense	65	411
Other comprehensive (loss) income, net of tax	(1,164)	5,099
Comprehensive income	$ 3,384	$ 6,793