Loans and Allowance for Credit Losses - Schedule of Types of Collateral (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 31,822,374	$ 31,123,641
Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	168,197	168,623
Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	42,140	43,245
Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,880	4,408
Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	4,796	5,085
Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,492	7,414
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	9,751,875	9,508,904
Commercial | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,899	8,962
Commercial | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	41,674	42,754
Commercial | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,219	2,690
Commercial | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,103	1,611
Commercial | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	124	980
Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	12,908,380	12,457,070
Commercial real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	100,490	108,871
Commercial real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Commercial real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,661	1,718
Commercial real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Commercial real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,334	6,411
BBCC | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,823	1,939
BBCC | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	464	478
BBCC | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
BBCC | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	12	12
BBCC | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	6,568,666	6,460,441
Residential real estate | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	35,488	34,660
Residential real estate | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Residential real estate | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,003,287	1,034,257
Indirect | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Indirect | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	3,428	3,230
Indirect | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Direct
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	580,726	629,186
Direct | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2,961	2,991
Direct | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	2	13
Direct | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Direct | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	253	232
Direct | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	34	23
Home equity
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	1,009,440	1,033,783
Home equity | Real Estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	13,536	11,200
Home equity | Blanket Lien
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Home equity | Investment Securities/Cash
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	0	0
Home equity | Auto
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans		0
Home equity | Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Total loans	$ 0	$ 0