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
Net income	$ 119,550	$ 83,026	$ 220,760	$ 193,413
Other comprehensive income (loss), net of tax:
Unrealized holding gains (losses) on investment securities	10,605	29,300	81,671	78,096
Noncredit-related impairment losses on securities not expected to be sold	0	(130)	0	(12,884)
Reclassification to earnings for realized net fixed income securities losses	(3,104)	712	(27,944)	(1,325)
Reclassification to earnings for net credit-related impairment losses on investment securities	0	2,549	17	8,548
Accretion of securities with noncredit-related impairment losses not expected to be sold	273	386	559	595
Net unrealized holding gains (losses) on derivative instruments	1,199	(1)	1,519	(3)
Reclassification adjustment for increase in interest income recognized in earnings on derivatives instruments	(348)	(469)	(558)	(1,426)
Other comprehensive income (loss)	8,625	32,347	55,264	71,601
Comprehensive income	128,175	115,373	276,024	265,014
Comprehensive loss applicable to noncontrolling interests	0	0	0	(336)
Comprehensive income applicable to controlling interest	$ 128,175	$ 115,373	$ 276,024	$ 265,350