Statement of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net income	$ 32,990	$ 11,883	$ 77,990	$ 27,104
Net unrealized gains (losses) on AFS securities:
Unrealized gains	17,449	4,380	29,792	4,186
Net non-credit portion of OTTI losses on AFS securities:
Non-credit OTTI loss transferred from HTM securities	0	0	(662)	(2,697)
Net change in fair value of OTTI securities	62,497	(12,159)	117,751	47,643
Unrealized gains (losses)	26,851	(3,268)	34,361	7,446
Reclassification of gains included in net income	0	0	0	(7,278)
Reclassification of non-credit portion included in net income	186	6,155	9,495	37,089
Non-credit OTTI loss on AFS	0	(86)	0	(86)
Total net non-credit portion of OTTI losses on AFS securities	89,534	(9,358)	160,945	82,117
Net non-credit portion of OTTI losses on HTM securities:
Non-credit portion	0	0	(662)	(2,697)
Reclassification of non-credit portion from HTM to AFS securities	0	0	662	2,697
Total net non-credit portion of OTTI losses on HTM securities	0	0	0	0
Reclassification of net losses included in net income relating to hedging activities	0	3	0	18
Pension and post-retirement benefits	29	(4)	54	(12)
Total other comprehensive income	107,012	(4,979)	190,791	86,309
Total comprehensive income	$ 140,002	$ 6,904	$ 268,781	$ 113,413