Allowance for Credit Losses - Loans on Nonaccrual Status and Loans Past Due 90 Days or More and Still Accruing (Details) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) loan	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	$ 66,291	$ 66,291	$ 146,774
End of Period Nonaccrual		31,775	66,291
Nonaccrual With No Related Allowance		13,780	37,469
Interest income recognized on nonaccrual		909	1,128
Number of modified loans | loan	8
Modified loans	$ 28,800
Commercial Loans | Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	31,488	31,488	101,070
End of Period Nonaccrual		15,022	31,488
Nonaccrual With No Related Allowance		11,974	28,046
Interest income recognized on nonaccrual		557	158
Commercial Loans | Commercial and industrial
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	15,239	15,239	16,985
End of Period Nonaccrual		342	15,239
Nonaccrual With No Related Allowance		0	5,707
Interest income recognized on nonaccrual		84	74
Commercial Loans | Commercial construction
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	2,471	2,471	384
End of Period Nonaccrual		864	2,471
Nonaccrual With No Related Allowance		480	2,020
Interest income recognized on nonaccrual		0	(28)
Commercial Loans | Business banking
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	9,641	9,641	17,122
End of Period Nonaccrual		7,907	9,641
Nonaccrual With No Related Allowance		1,326	1,696
Interest income recognized on nonaccrual		136	427
Consumer Loans | Consumer real estate
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	7,294	7,294	11,117
End of Period Nonaccrual		7,384	7,294
Nonaccrual With No Related Allowance		0	0
Interest income recognized on nonaccrual		132	496
Consumer Loans | Other Consumer
Financing Receivable, Nonaccrual [Line Items]
Beginning of Period Nonaccrual	$ 158	158	96
End of Period Nonaccrual		256	158
Nonaccrual With No Related Allowance		0	0
Interest income recognized on nonaccrual		$ 0	$ 1