Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Statement of Comprehensive Income [Abstract]
Reclassification adjustment for net gains	$ 84	$ 1,609	$ 3,094
Unrealized losses related to factors other than credit, tax benefit	0	0	34
Reclassification adjustment for impairments realized in net income, tax benefit	0	42	108
Accretion of unrealized losses related to factors other than credit to investment securities held to maturity , tax benefit	$ 37	$ 84	$ 66