Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (4,678)	$ 46,424	$ (3,735)	$ 48,120
Other Comprehensive (loss) income:
Change in unrealized gain (loss) on investment securities available-for-sale	2,715	(1,367)	3,450	(2,252)
Tax effect of the unrealized gain on investment securities available-for-sale	(1,032)	519	(1,311)	856
Total other comprehensive income (loss)	1,683	(848)	2,139	(1,396)
Comprehensive (loss) income	$ (2,995)	$ 45,576	$ (1,596)	$ 46,724