Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 15,747	$ 16,006	$ 11,571
Other comprehensive income (loss):
Unrealized gains (losses) on securities available for sale	(9,379)	1,647	11,622
Income tax (expense) benefit	3,282	(576)	(4,068)
Reclassification adjustment for (gains) losses on securities	(192)	(158)	1
Income tax expense	67	55	0
Reclassification adjustment for losses on securities other-than temporarily impaired	0	0	0
Income tax benefit	0	0	0
Change in unfunded pension liability	1,761	(309)	(871)
Income tax (expense) benefit	(616)	108	305
Other comprehensive income (loss)	(5,077)	767	6,989
Comprehensive income	$ 10,670	$ 16,773	$ 18,560