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
Net income (loss)	$ (262,146)	$ 84,050	$ (124,168)	$ 242,498
Other comprehensive income (loss):
Net unrealized gains (losses) on securities available for sale	191,227	222,946	(455,185)	295,018
Net unrealized gains (losses) on interest rate hedges	45,227	(1,382)	107,952	(33,116)
Other comprehensive income (loss)	236,454	221,564	(347,233)	261,902
Comprehensive income (loss)	$ (25,692)	$ 305,614	$ (471,401)	$ 504,400