CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 88,756		$ 73,157		$ 249,485		$ 219,263
Unrealized gains (losses) on investment securities available-for-sale:
Net unrealized holding gains (losses) arising during period	1,663		(2,876)		31,980		(22,905)
Reclassification adjustment for net gains included in net income	(1,457)	[1]	(629)	[1]	(3,829)	[1]	(6,964)	[1]
Net unrealized (losses) gains on other investments	(99)		5		(120)		22
Other comprehensive income (loss)	107		(3,500)		28,031		(29,847)
COMPREHENSIVE INCOME	$ 88,863		$ 69,657		$ 277,516		$ 189,416

[1] The pretax amount is reported in net gains on sales of investment securities in the consolidated statements of income.