Loans and Allowance for Credit Losses - Loans on Nonaccrual Status and Loans Past Due 90 Days or More and Still Accruing (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	$ 19,052	$ 66,291
End of Period Nonaccrual	24,644	19,052
Nonaccrual With No Related Allowance	5,442	6,582
Interest income recognized on nonaccrual	201	1,385
Commercial Loans | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	7,100	31,488
End of Period Nonaccrual	7,425	7,100
Nonaccrual With No Related Allowance	5,442	5,649
Interest income recognized on nonaccrual	1	580
Commercial Loans | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	283	15,239
End of Period Nonaccrual	7,075	283
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	0	148
Commercial Loans | Commercial construction
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	384	2,471
End of Period Nonaccrual	384	384
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	0	171
Commercial Loans | Business banking
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	4,490	9,641
End of Period Nonaccrual	3,915	4,490
Nonaccrual With No Related Allowance	0	933
Interest income recognized on nonaccrual	108	228
Consumer Loans | Consumer real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	6,526	7,294
End of Period Nonaccrual	5,529	6,526
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	91	257
Consumer Loans | Other consumer
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	269	158
End of Period Nonaccrual	316	269
Nonaccrual With No Related Allowance	0	0
Interest income recognized on nonaccrual	$ 1	$ 1