Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net income attributable to the Company	$ 22,686	$ 15,662
Other comprehensive income/ (loss), net of tax [Abstract]
Unrealized gain/ (loss) on securities available-for-sale	(12,895)	2,094
Reclassification adjustment for net realized gain/ (loss) included in net income	0	(11)
Net unrealized gain/ (loss) on securities available-for-sale	(12,895)	2,083
Unrealized gain/ (loss) on cash flow hedges	588	36
Reclassification adjustment for net realized gain/ (loss) included in net income	(14)	180
Net change in unrealized gain/ (loss) on cash flow hedges	574	216
Net unrealized gain/ (loss) on other	0	12
Other comprehensive income/ (loss), net of tax	(12,321)	2,311
Total comprehensive income, attributable to the Company, net	$ 10,365	$ 17,973