Loans - Allowance for credit loss activity (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020		Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Allowance	$ 82,079	$ 31,243		$ 28,331
Impact of ASC 326 Adoption		2,354
Acquisition related allowance for credit loss (PCD)		7,698
Charge-Offs	(11,385)	(6,352)		(1,725)
Recoveries	2,507	3,982		1,732
Provision expense (recovery)	6,733	43,154	[1]	2,905
Ending Allowance	66,468	82,079		31,243
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Allowance	17,534	2,867		2,881
Impact of ASC 326 Adoption		1,765
Acquisition related allowance for credit loss (PCD)		1,077
Charge-Offs	(110)	(307)		(515)
Recoveries	261	342		193
Provision expense (recovery)	(5,656)	11,790	[1]	308
Ending Allowance	12,029	17,534		2,867
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Allowance	43,417	16,302		15,142
Impact of ASC 326 Adoption		3,682
Acquisition related allowance for credit loss (PCD)		4,053
Charge-Offs	(3,776)	(4,237)		(148)
Recoveries	438	1,352		645
Provision expense (recovery)	(7,680)	22,265	[1]	663
Ending Allowance	32,399	43,417		16,302
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Allowance	2,741	996		682
Impact of ASC 326 Adoption		223
Charge-Offs		(1)
Provision expense (recovery)	263	1,969	[1]	314
Ending Allowance	3,004	2,741		996
Home Equity and Improvement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Allowance	4,739	1,700		2,026
Impact of ASC 326 Adoption		(521)
Acquisition related allowance for credit loss (PCD)		248
Charge-Offs	(63)	(164)		(245)
Recoveries	248	262		184
Provision expense (recovery)	(703)	3,214	[1]	(265)
Ending Allowance	4,221	4,739		1,700
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Allowance	11,665	9,003		7,281
Impact of ASC 326 Adoption		(2,263)
Acquisition related allowance for credit loss (PCD)		2,272
Charge-Offs	(6,960)	(1,350)		(528)
Recoveries	1,321	1,850		642
Provision expense (recovery)	7,384	2,153	[1]	(1,608)
Ending Allowance	13,410	11,665		9,003
Consumer Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Beginning Allowance	1,983	375		319
Impact of ASC 326 Adoption		(86)
Acquisition related allowance for credit loss (PCD)		48
Charge-Offs	(476)	(293)		(289)
Recoveries	239	176		68
Provision expense (recovery)	341	1,763	[1]	277
Ending Allowance	$ 1,405	$ 1,983		$ 375

[1] Provision for the twelve months ended December 31, 2020, includes $25.9 million as a result of the Merger with UCFC in the first quarter.