Allowance for Credit Losses - Loans (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period	$ 67,252	$ 48,884	$ 71,124	$ 40,003
Charge-offs	(1,861)	(141)	(3,132)	(624)
Recoveries	312	96	519	237
Net (charge-offs) recoveries	(1,549)	(45)	(2,613)	(387)
(Benefit) provision for credit loss - loans	(5,314)	9,000	(8,122)	18,223
Balance at end of the period	$ 60,389	$ 57,839	$ 60,389	$ 57,839