CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Transfers from Held-to-maturity to Available-for-Sale Securities, Tax	$ 0	$ 0	$ (5,367)	$ 0
Unrealized gain on securities available-for-sale securities, tax	(672)	2,887	(13,331)	14,327
Unrealized gain on cash flow hedge, tax	0	18	0	10
Realized gain on sale of securities, tax	$ 68	$ (633)	$ 144	$ (580)