Non Purchased Loans - Narrative (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) loan	Dec. 31, 2020 USD ($) loan	Dec. 31, 2019 USD ($) loan
Loans and Allowance for Loan Losses (Additional Textual) [Abstract]
Outstanding balance of restructured loans	$ 9,856,743,000	$ 10,757,503,000
Minimum duration for past due residential loans to be considered as nonperforming	90 days
Allowance for credit losses on interest deferred	$ 164,171,000	$ 176,144,000	$ 52,162,000
Non purchased loans and leases
Loans and Allowance for Loan Losses (Additional Textual) [Abstract]
Nonperforming loans charged-off past due period	90 days
Number of restructured loans | loan	0	2
Minimum duration for past due residential loans to be considered as nonperforming	90 days	90 days
Modifications, recorded investment	$ 14,650,000	$ 11,761,000	4,679,000
Modifications, subsequent default, recorded investment	117,000	448,000	$ 0
Remaining availability under commitments to lend additional funds on restructured loans	$ 305,000	$ 0
Number of loan modifications | loan	42	38	7
Modified loans, balance	$ 11,130,000	$ 9,040,000	$ 647,000
Unfunded commitment	$ 10,471,000	19,911,000
Non purchased loans and leases | Payment Deferral | Loan Deferral Program, CARES Act
Loans and Allowance for Loan Losses (Additional Textual) [Abstract]
Deferral period	90 days
Additional deferral period	90 days
Number of loan modifications | loan	7
Modified loans, balance	$ 443,000
Non purchased loans and leases | Nonaccruing Loans
Loans and Allowance for Loan Losses (Additional Textual) [Abstract]
Outstanding balance of restructured loans		177,000
Non purchased loans and leases | Restructured Loans
Loans and Allowance for Loan Losses (Additional Textual) [Abstract]
Outstanding balance of restructured loans	15,322,000	5,787,000
Allowance for credit losses on interest deferred	$ 285,000	$ 337,000