Allowance for Credit Losses - Summary of Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	$ 62,224	$ 60,996
Charge-offs	(106,365)	(16,189)
Recoveries	2,986	2,544
Net (Charge-offs)	(103,379)	(13,645)
Provision for credit losses on loans	131,421	14,873
Balance at End of Period	117,612	62,224
Commercial real estate | Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	30,577	33,707
Charge-offs	(26,460)	(3,664)
Recoveries	240	137
Net (Charge-offs)	(26,220)	(3,527)
Provision for credit losses on loans	56,489	397
Balance at End of Period	65,656	30,577
Commercial and industrial | Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	15,681	11,596
Charge-offs	(74,282)	(8,928)
Recoveries	1,560	1,388
Net (Charge-offs)	(72,722)	(7,540)
Provision for credit losses on loans	65,288	11,625
Balance at End of Period	16,100	15,681
Other Consumer | Commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	7,900	7,983
Charge-offs	(454)	(406)
Recoveries	183	5
Net (Charge-offs)	(271)	(401)
Provision for credit losses on loans	2,986	318
Balance at End of Period	7,239	7,900
Consumer real estate | Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	6,337	6,187
Charge-offs	(667)	(1,353)
Recoveries	187	637
Net (Charge-offs)	(480)	(716)
Provision for credit losses on loans	(368)	866
Balance at End of Period	10,014	6,337
Other consumer | Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of period	1,729	1,523
Charge-offs	(1,890)	(1,838)
Recoveries	488	377
Net (Charge-offs)	(1,402)	(1,461)
Provision for credit losses on loans	1,723	1,667
Balance at End of Period	$ 2,686	$ 1,729