Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Statement Of Income And Comprehensive Income [Abstract]
NET INCOME (LOSS)	$ 45,141	$ 447	$ 50,139	$ (950)
Other comprehensive income:
Unrealized gains (losses) on securities available for sale	(3,418)	2,745	(17,102)	5,262
Unrealized gains on transfer of securities held for investment into securities available for sale	0	0	724	0
Reclassification adjustment for securities gains and losses included in income	366	(64)	(149)	(6,342)
Provision for income taxes (benefit)	1,178	(1,035)	6,379	417
COMPREHENSIVE INCOME (LOSS)	$ 43,267	$ 2,093	$ 39,991	$ (1,613)