Loans and Allowance for Credit Losses - Detail activity in the allowance for credit losses by portfolio segment (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,	$ 109,579	$ 73,658
Loans charged-off	(14,439)	(20,259)
Recoveries of loans previously charged-off	1,100	162
Net loans charged-off	(13,339)	(20,097)
Provision for credit losses	(21,275)	45,404
Individually evaluated for impairment	6,955	15,442
Collectively evaluated for impairment	68,010	94,137
Ending balance	74,965	109,579
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,		10,614
Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,	26,569	18,832
Loans charged-off	(8,788)	(12,082)
Recoveries of loans previously charged-off	486	130
Net loans charged-off	(8,302)	(11,952)
Provision for credit losses	(3,792)	18,797
Ending balance	14,475	26,569
Commercial \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,		892
Income producing - commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,	55,385	29,265
Loans charged-off	0	(4,300)
Recoveries of loans previously charged-off	0	0
Net loans charged-off	0	(4,300)
Provision for credit losses	(17,098)	19,190
Individually evaluated for impairment	5,156	6,425
Collectively evaluated for impairment	33,131	48,960
Ending balance	38,287	55,385
Income producing - commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,		11,230
Owner occupied - commercial real estate
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,	14,000	5,838
Loans charged-off	(5,444)	(20)
Recoveries of loans previously charged-off	97	0
Net loans charged-off	(5,347)	(20)
Provision for credit losses	3,493	3,508
Individually evaluated for impairment	0	1,241
Collectively evaluated for impairment	12,146	12,759
Ending balance	12,146	14,000
Owner occupied - commercial real estate \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,		4,674
Real estate mortgage - residential
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,	1,020	1,557
Loans charged-off	0	(815)
Recoveries of loans previously charged-off	0	0
Net loans charged-off	0	(815)
Provision for credit losses	(571)	579
Individually evaluated for impairment	0	330
Collectively evaluated for impairment	449	690
Ending balance	449	1,020
Real estate mortgage - residential \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,		(301)
Construction - commercial and residential
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,	11,529	17,485
Loans charged-off	(206)	(2,947)
Recoveries of loans previously charged-off	499	4
Net loans charged-off	293	(2,943)
Provision for credit losses	(2,723)	3,130
Ending balance	9,099	11,529
Construction - commercial and residential \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,		(6,143)
Home equity
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,	1,039	656
Loans charged-off	0	(92)
Recoveries of loans previously charged-off	0	0
Net loans charged-off	0	(92)
Provision for credit losses	(565)	230
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	474	1,039
Ending balance	474	1,039
Home equity \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,		245
Other consumer
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,	37	25
Loans charged-off	(1)	(3)
Recoveries of loans previously charged-off	18	28
Net loans charged-off	17	25
Provision for credit losses	(19)	(30)
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	35	37
Ending balance	$ 35	37
Other consumer \| Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Balance at January 1,		$ 17

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Amount, after recoveries, of loans and leases that have been written-off.

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Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of expense related to estimated loss from loan and lease transactions.

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