Interest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Banking and Thrift, Interest [Abstract]
Interest and finance income	$ 494,349	$ 440,751	$ 382,983
Amortization of net deferred origination costs	(67,061)	(58,047)	(49,075)
Interest and finance income, net	427,288	382,704	333,908
Interest income on deposits and investments	1,135	240	132
Total interest and finance income	$ 428,423	$ 382,944	$ 334,040