Allowance for Credit Losses - Loans on Nonaccrual Status and Loans Past Due 90 Days or More and Still Accruing (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	$ 66,291	$ 146,774
End of Period Nonaccrual	19,052	66,291
Nonaccrual With No Related Allowance	6,582	37,469
Interest Income Recognized on Nonaccrual	1,385	1,128
Commercial | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	31,488	101,070
End of Period Nonaccrual	7,100	31,488
Nonaccrual With No Related Allowance	5,649	28,046
Interest Income Recognized on Nonaccrual	580	158
Commercial | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	15,239	16,985
End of Period Nonaccrual	283	15,239
Nonaccrual With No Related Allowance	0	5,707
Interest Income Recognized on Nonaccrual	148	74
Commercial | Commercial construction
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	2,471	384
End of Period Nonaccrual	384	2,471
Nonaccrual With No Related Allowance	0	2,020
Interest Income Recognized on Nonaccrual	171	(28)
Commercial | Business banking
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	9,641	17,122
End of Period Nonaccrual	4,490	9,641
Nonaccrual With No Related Allowance	933	1,696
Interest Income Recognized on Nonaccrual	228	427
Consumer | Consumer real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	7,294	11,117
End of Period Nonaccrual	6,526	7,294
Nonaccrual With No Related Allowance	0	0
Interest Income Recognized on Nonaccrual	257	496
Consumer | Other consumer
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	158	96
End of Period Nonaccrual	269	158
Nonaccrual With No Related Allowance	0	0
Interest Income Recognized on Nonaccrual	$ 1	$ 1