Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income attributable to the Company	$ 19,803	$ 19,636	$ 58,871	$ 54,075
Other comprehensive income/ (loss), net of tax [Abstract]
Unrealized gain/ (loss) on securities available-for-sale	1,114	(2,976)	7,588	12,322
Reclassification adjustment for net realized gain/ (loss) included in net income	(141)	(172)	(293)	(330)
Net unrealized gain/ (loss) on securities available-for-sale	973	(3,148)	7,295	11,992
Unrealized gain/ (loss) on cash flow hedges	70	379	(140)	(1,119)
Reclassification adjustment for net realized gain/ (loss) included in net income	172	249	558	761
Net change in unrealized gain/ (loss) on cash flow hedges	242	628	418	(358)
Net unrealized gain/ (loss) on other	0	0	12	0
Other comprehensive income/ (loss), net of tax	1,215	(2,520)	7,725	11,634
Total comprehensive income, attributable to the Company, net	$ 21,018	$ 17,116	$ 66,596	$ 65,709