Consolidated Statements Of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 65,512	$ 27,055
Other comprehensive income/(loss), net of tax:
Changes in unrealized gains/(losses) on available-for-sale securities	[1]	3,777	(1,028)
Amortization of losses of securities transferred to held-to-maturity from available-for-sale		524	509
Changes in unrealized gains/(losses) on cash flow hedging instruments	[2]	1,033	(4,980)
Foreign currency translation adjustment	[3]	2,294	(2,186)
Total other comprehensive income/(loss), net of tax		7,628	(7,685)
Comprehensive income		$ 73,140	$ 19,370

[1] There were no reclassifications to earnings during the three months ended March 31, 2017 and 2016, respectively.

[2] Amounts are net of reclassifications to earnings of losses of $0.9 million and $1.3 million for the three months ended March 31, 2017 and 2016, respectively.

[3] Net of tax expense of $4.8 million and tax benefit of $4.7 million for the three months ended March 31, 2017 and 2016, respectively.