Allowance for Credit Losses - Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period	$ 60,389	$ 57,839	$ 71,124	$ 40,003
Charge-offs	(996)	(682)	(4,128)	(1,306)
Recoveries	1,266	85	1,785	322
Net recoveries (charge-offs)	270	(597)	(2,343)	(984)
(Benefit) provision for credit loss - loans	(2,706)	8,000	(10,828)	26,223
Balance at end of the period	$ 57,953	$ 65,242	$ 57,953	$ 65,242