Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income	$ 101,210	$ 110,387
Other comprehensive income (loss), net of tax:
Unrealized holding gains (losses) on investment securities	71,066	48,796
Noncredit-related impairment losses on securities not expected to be sold	0	(12,754)
Reclassification to earnings for realized net fixed income securities losses	(24,840)	(2,037)
Reclassification to earnings for net credit-related impairment losses on investment securities	17	5,999
Accretion of securities with noncredit-related impairment losses not expected to be sold	286	209
Net unrealized holding gains (losses) on derivative instruments	320	(2)
Reclassification adjustment for increase in interest income recognized in earnings on derivatives instruments	(210)	(957)
Other comprehensive income (loss)	46,639	39,254
Comprehensive income	147,849	149,641
Comprehensive loss applicable to noncontrolling interests	0	(336)
Comprehensive income applicable to controlling interest	$ 147,849	$ 149,977