Loans and Allowance for Credit Losses - Schedule of Nonaccrual Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	$ 261,346	$ 238,178
Nonaccrual With No Related Allowance	43,153	41,318
Past Due 90 Days or More and Accruing	1,192	2,650
Commercial
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	49,108	60,372
Nonaccrual With No Related Allowance	13,432	7,873
Past Due 90 Days or More and Accruing	577	152
Commercial real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	143,600	122,290
Nonaccrual With No Related Allowance	29,721	33,445
Past Due 90 Days or More and Accruing	104	0
BBCC
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	3,721	2,429
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	0	0
Residential real estate
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	40,342	34,660
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	0	1,808
Indirect
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	3,870	3,230
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	54	28
Direct
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	5,705	3,997
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	109	133
Home equity
Financing Receivable, Nonaccrual [Line Items]
Nonaccrual Amortized Cost	15,000	11,200
Nonaccrual With No Related Allowance	0	0
Past Due 90 Days or More and Accruing	$ 348	$ 529