Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 169,183	$ 119,600	$ 140,406
Other comprehensive (loss) income:
Net unrealized gain (loss) on available-for-sale securities	17,077	(7,298)	22,864
Reclassification of unrealized gain on available-for-sale securities to net income	(19,967)	(25,561)	(10,536)
Net unrealized (loss) gain on interest rate agreements	(16,894)
Net unrealized (loss) gain on interest rate agreements		8,908	1,022
Reclassification of unrealized loss on interest rate agreements to net income	0
Reclassification of unrealized loss on interest rate agreements to net income		0	45
Total other comprehensive (loss) income	(19,784)	(23,951)	13,395
Total Comprehensive Income	$ 149,399	$ 95,649	$ 153,801