Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net Income	$ 15,854	$ 9,847	$ 32,223	$ 33,219
Other comprehensive (loss) income, before tax benefit (expense):
Unrealized holding (losses) gains on securities arising during the period	(4,239)	2,068	(36,585)	3,165
Non-credit related gains on securities not expected to be sold (recognized in other comprehensive income)	(236)	(1,374)	(4,941)	(1,549)
Less: reclassification adjustment for gains on securities included in net income	(229)	(163)	(237)	(163)
Total other comprehensive (loss) income, before tax benefit (expense)	(4,232)	3,279	(31,881)	4,551
Income tax benefit (expense) related to items of other comprehensive (loss) income	1,485	(1,146)	11,153	(1,585)
Total other comprehensive (loss) income	(2,747)	2,133	(20,728)	2,966
Comprehensive Income	$ 13,107	$ 11,980	$ 11,495	$ 36,185