Fees and Commissions Revenue Fees and Commissions (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024		Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Total fees and commissions		$ 200,564		$ 185,979
Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		200,564		185,979
Fees and commission revenue not from contracts with customers		73,755	[1]	62,477	[2]
Fees and commissions revenue from contracts with customers		126,809	[3]	123,502	[4]
Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		59,179		52,396
Fees and commission revenue not from contracts with customers		46,876	[1]	39,550	[2]
Fees and commissions revenue from contracts with customers		12,303	[3]	12,846	[4]
Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		37,457		27,598
Fees and commission revenue not from contracts with customers		37,457	[1]	27,598	[2]
Fees and commissions revenue from contracts with customers		0	[3]	0	[4]
Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		6,325		8,354
Fees and commission revenue not from contracts with customers		6,325	[1]	8,354	[2]
Fees and commissions revenue from contracts with customers		0	[3]	0	[4]
Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		4,693		3,844
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		4,693	[3]	3,844	[4]
Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions				3,306
Fees and commission revenue not from contracts with customers	[2]			0
Fees and commissions revenue from contracts with customers	[4]			3,306
Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		10,704		9,294
Fees and commission revenue not from contracts with customers		3,094	[1]	3,598	[2]
Fees and commissions revenue from contracts with customers		7,610	[3]	5,696	[4]
Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		25,493		25,621
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		25,493	[3]	25,621	[4]
TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		21,274		21,392
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		21,274	[3]	21,392	[4]
Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		2,189		2,158
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		2,189	[3]	2,158	[4]
Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		2,030		2,071
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		2,030	[3]	2,071	[4]
Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		55,305		50,657
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		55,305	[3]	50,657	[4]
Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		24,345		23,527
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		24,345	[3]	23,527	[4]
Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		9,260		7,660
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		9,260	[3]	7,660	[4]
Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		16,148		13,253
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		16,148	[3]	13,253	[4]
Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		5,552		6,217
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		5,552	[3]	6,217	[4]
Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		28,685		25,968
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		28,685	[3]	25,968	[4]
Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		15,977		13,847
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		15,977	[3]	13,847	[4]
Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		5,460		4,873
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		5,460	[3]	4,873	[4]
Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		5,670		5,639
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		5,670	[3]	5,639	[4]
Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		1,578		1,609
Fees and commission revenue not from contracts with customers		0	[1]	0	[2]
Fees and commissions revenue from contracts with customers		1,578	[3]	1,609	[4]
Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		18,967		14,367
Fees and commission revenue not from contracts with customers		18,967	[1]	14,367	[2]
Fees and commissions revenue from contracts with customers		0	[3]	0	[4]
Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		3,525		(633)
Fees and commission revenue not from contracts with customers		3,525	[1]	(633)	[2]
Fees and commissions revenue from contracts with customers		0	[3]	0	[4]
Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		15,442		15,000
Fees and commission revenue not from contracts with customers		15,442	[1]	15,000	[2]
Fees and commissions revenue from contracts with customers		0	[3]	0	[4]
Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		12,935		16,970
Fees and commission revenue not from contracts with customers		7,912	[1]	8,560	[2]
Fees and commissions revenue from contracts with customers		5,023	[3]	8,410	[4]
Operating Segments [Member] | Commercial [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		50,630		55,835
Operating Segments [Member] | Commercial [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		7,562		10,185
Operating Segments [Member] | Commercial [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		3,743		6,487
Operating Segments [Member] | Commercial [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions				0
Operating Segments [Member] | Commercial [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		3,819		3,698
Operating Segments [Member] | Commercial [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		24,384		24,434
Operating Segments [Member] | Commercial [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		20,466		20,499
Operating Segments [Member] | Commercial [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		2,180		2,150
Operating Segments [Member] | Commercial [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		1,738		1,785
Operating Segments [Member] | Commercial [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		15,205		13,133
Operating Segments [Member] | Commercial [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		14,900		12,871
Operating Segments [Member] | Commercial [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		36		25
Operating Segments [Member] | Commercial [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		269		237
Operating Segments [Member] | Commercial [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Commercial [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		3,479		8,083
Operating Segments [Member] | Consumer [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		36,207		30,581
Operating Segments [Member] | Consumer [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions				0
Operating Segments [Member] | Consumer [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		835		916
Operating Segments [Member] | Consumer [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		826		908
Operating Segments [Member] | Consumer [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		9		8
Operating Segments [Member] | Consumer [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Consumer [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		12,831		12,278
Operating Segments [Member] | Consumer [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		531		499
Operating Segments [Member] | Consumer [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		5,394		4,828
Operating Segments [Member] | Consumer [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		5,670		5,638
Operating Segments [Member] | Consumer [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		1,236		1,313
Operating Segments [Member] | Consumer [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		19,640		14,925
Operating Segments [Member] | Consumer [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		3,525		(633)
Operating Segments [Member] | Consumer [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		16,115		15,558
Operating Segments [Member] | Consumer [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		2,901		2,462
Operating Segments [Member] | Wealth Management [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		118,704		108,911
Operating Segments [Member] | Wealth Management [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		51,055		40,444
Operating Segments [Member] | Wealth Management [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		37,457		27,598
Operating Segments [Member] | Wealth Management [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		2,020		100
Operating Segments [Member] | Wealth Management [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		4,693		3,844
Operating Segments [Member] | Wealth Management [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions				3,306
Operating Segments [Member] | Wealth Management [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		6,885		5,596
Operating Segments [Member] | Wealth Management [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		161		160
Operating Segments [Member] | Wealth Management [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		(18)		(17)
Operating Segments [Member] | Wealth Management [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Wealth Management [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		179		177
Operating Segments [Member] | Wealth Management [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		55,305		50,678
Operating Segments [Member] | Wealth Management [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		24,345		23,527
Operating Segments [Member] | Wealth Management [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		9,260		7,660
Operating Segments [Member] | Wealth Management [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		16,148		13,253
Operating Segments [Member] | Wealth Management [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		5,552		6,238
Operating Segments [Member] | Wealth Management [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		649		556
Operating Segments [Member] | Wealth Management [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		546		477
Operating Segments [Member] | Wealth Management [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		30		20
Operating Segments [Member] | Wealth Management [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Wealth Management [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		73		59
Operating Segments [Member] | Wealth Management [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Wealth Management [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Wealth Management [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Operating Segments [Member] | Wealth Management [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		11,534		17,073
Funds Management and Other [Member] | Fees and commissions revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		(4,977)		(9,348)
Funds Management and Other [Member] | Brokerage and trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		562		1,767
Funds Management and Other [Member] | Trading revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Customer hedging revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		562		1,767
Funds Management and Other [Member] | Retail brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Insurance brokerage revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions				0
Funds Management and Other [Member] | Investment banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Transaction card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		113		111
Funds Management and Other [Member] | TransFund EFT network revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		2
Funds Management and Other [Member] | Merchant services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Corporate card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		113		109
Funds Management and Other [Member] | Fiduciary and asset management revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		(21)
Funds Management and Other [Member] | Personal trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Corporate trust revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Institutional trust & retirement plan services revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Investment management services and other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		(21)
Funds Management and Other [Member] | Deposit service charges and fees [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		1
Funds Management and Other [Member] | Commercial account service charge revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Overdraft fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Check card revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		1
Funds Management and Other [Member] | Automated service charge and other deposit fee revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Mortgage banking revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		(673)		(558)
Funds Management and Other [Member] | Mortgage production revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		0		0
Funds Management and Other [Member] | Mortgage servicing revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		(673)		(558)
Funds Management and Other [Member] | Other revenue [Member]
Disaggregation of Revenue [Line Items]
Total fees and commissions		$ (4,979)		$ (10,648)

[1] Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

[2] Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.

[3] In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

[4] In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.