Portfolio Loans - Activity in the allowance for loan losses (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Activity in the allowance for loan losses
ACL beginning balance	$ 87,887	$ 101,048
Provision for credit losses	(253)	(6,796)
Charged-off	(125)	(964)
Recoveries	704	655
ACL ending balance	88,213	93,943
Allowance for loan losses Ending balance attributed to:
Collectively evaluated for impairment	84,843		$ 84,298
Individually evaluated for impairment	3,370		3,589
Total	88,213	93,943	87,887
Loans:
Collectively evaluated for impairment	7,261,104		7,173,618
Individually evaluated for impairment	11,769		15,380
Total	7,272,873		7,188,998
Commercial Loans
Activity in the allowance for loan losses
ACL beginning balance	23,855	23,866
Provision for credit losses	251	(665)
Charged-off		(262)
Recoveries	67	86
ACL ending balance	24,173	23,025
Allowance for loan losses Ending balance attributed to:
Collectively evaluated for impairment	20,828		20,291
Individually evaluated for impairment	3,345		3,564
Total	24,173	23,025	23,855
Loans:
Collectively evaluated for impairment	1,899,814		1,936,898
Individually evaluated for impairment	6,781		6,988
Total	1,906,595		1,943,886
Commercial Real Estate Loans
Activity in the allowance for loan losses
ACL beginning balance	38,249	46,230
Provision for credit losses	(1,218)	(2,695)
Charged-off		(303)
Recoveries	308	74
ACL ending balance	37,339	43,306
Allowance for loan losses Ending balance attributed to:
Collectively evaluated for impairment	37,339		38,249
Total	37,339	43,306	38,249
Loans:
Collectively evaluated for impairment	3,132,408		3,114,057
Individually evaluated for impairment	2,386		5,750
Total	3,134,794		3,119,807
Real Estate Construction
Activity in the allowance for loan losses
ACL beginning balance	5,102	8,193
Provision for credit losses	510	(1,250)
Charged-off		(209)
Recoveries	93	145
ACL ending balance	5,705	6,879
Allowance for loan losses Ending balance attributed to:
Collectively evaluated for impairment	5,705		5,102
Total	5,705	6,879	5,102
Loans:
Collectively evaluated for impairment	445,162		385,724
Individually evaluated for impairment	266		272
Total	445,428		385,996
Retail real estate
Activity in the allowance for loan losses
ACL beginning balance	17,589	21,992
Provision for credit losses	(170)	(2,276)
Charged-off	(16)	(3)
Recoveries	152	265
ACL ending balance	17,555	19,978
Allowance for loan losses Ending balance attributed to:
Collectively evaluated for impairment	17,530		17,564
Individually evaluated for impairment	25		25
Total	17,555	19,978	17,589
Loans:
Collectively evaluated for impairment	1,542,029		1,510,606
Individually evaluated for impairment	2,336		2,370
Total	1,544,365		1,512,976
Retail other
Activity in the allowance for loan losses
ACL beginning balance	3,092	767
Provision for credit losses	374	90
Charged-off	(109)	(187)
Recoveries	84	85
ACL ending balance	3,441	755
Allowance for loan losses Ending balance attributed to:
Collectively evaluated for impairment	3,441		3,092
Total	3,441	$ 755	3,092
Loans:
Collectively evaluated for impairment	241,691		226,333
Total	$ 241,691		$ 226,333

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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