Consolidated Statements of Comprehensive Income (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reclassification of held-to-maturity from available-for-sale securities	$ (64)	$ (27)	$ 0
Reclassification adjustments for net gains realized in earnings, derivatives, tax	247	208
Available-for-sale securities [Member]
Reclassification adjustments for net gains realized in earnings, available-for-sale, tax	345
Reclassification of held-to-maturity from available-for-sale securities	411	1,573	562
Held-to-maturity securities [Member]
Reclassification adjustments for net gains realized in earnings, available-for-sale, tax	$ 345