Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Net income	$ 70,739	$ 89,144	$ 137,978	$ 158,448
Other comprehensive (loss) income:
Net unrealized (losses) gains on securities available for sale	(627,560)	47,241	(646,412)	72,072
Net unrealized gains (losses) on interest rate hedges	37,679	(33,988)	62,725	(31,734)
Net current period other comprehensive income (loss)	(589,881)	13,253	(583,687)	40,338
Comprehensive (loss) income	$ (519,142)	$ 102,397	$ (445,709)	$ 198,786