CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 76,741	$ 72,091
Unrealized gain on investment securities available-for-sale:
Unrealized holding gains arising during period	15,422	4,741
Reclassification adjustment for net gains included in net income	(1,983)	(3,235)
Unrealized (losses) gains on other investments	(17)	10
Other comprehensive income	13,422	1,516
COMPREHENSIVE INCOME	$ 90,163	$ 73,607