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
Net income attributable to the Company	$ 18,265	$ 18,336	$ 56,638	$ 52,867
Other comprehensive income/ (loss), net of tax [Abstract]
Unrealized gain/ (loss) on securities available for sale	(659)	(550)	2,692	(6,521)
Reclassification adjustment for net realized gain/ (loss) included in net income	4	4	5	20
Net unrealized gain/ (loss) on securities available for sale	(663)	(554)	2,687	(6,541)
Unrealized gain/ (loss) on cash flow hedges	390	(964)	(1,082)	(280)
Reclassification adjustment for net realized gain/ (loss) included in net income	(503)	(316)	(1,280)	(856)
Net change in unrealized gain/ (loss) on cash flow hedges	893	(648)	198	576
Net unrealized gain/ (loss) on other	0	0	0	(442)
Other comprehensive income/ (loss), net of tax	230	(1,202)	2,885	(6,407)
Total comprehensive income/ (loss), attributable to the Company, net	$ 18,495	$ 17,134	$ 59,523	$ 46,460