Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net income attributable to the Company	$ 6,434	$ 23,406	$ 29,120	$ 39,068
Other comprehensive income/ (loss), net of tax [Abstract]
Unrealized gain/ (loss) on securities available-for-sale	(1,953)	4,380	(14,848)	6,474
Reclassification adjustment for net realized (gain)/ loss included in net income	0	(141)	0	(152)
Net unrealized gain/ (loss) on securities available-for-sale	(1,953)	4,239	(14,848)	6,322
Unrealized gain/ (loss) on cash flow hedges	124	(246)	712	(210)
Reclassification adjustment for net realized (gain)/ loss included in net income	(187)	206	(201)	386
Net change in unrealized gain/ (loss) on cash flow hedges	(63)	(40)	511	176
Net unrealized gain/ (loss) on other	1	0	1	12
Other comprehensive income/ (loss), net of tax	(2,015)	4,199	(14,336)	6,510
Total comprehensive income, attributable to the Company, net	$ 4,419	$ 27,605	$ 14,784	$ 45,578