Premises and Equipment and Lease Commitments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 387,743		$ 387,743		$ 485,363
Accumulated depreciation and amortization	(135,074)		(135,074)		(157,478)
Property, Plant and Equipment, Net	252,669		252,669		327,885
Depreciation and amortization expense	7,300	$ 6,700	22,100	$ 19,100
Right of Use Assets [Abstract]
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	293,013		293,013		126,767
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	1,148		1,148		1,318
Lease Liabilities [Abstract]
Operating Lease, Liability	300,965		300,965		133,108
Finance Lease, Liability	2,233		2,233		$ 2,458
Lease, Cost [Abstract]
Operating Lease, Cost	12,729	6,466	24,460	14,539
Short-term Lease, Cost	93	75	267	286
Finance Lease, Interest Expense	55	62	141	158
Amortization of right-of-use assets	75	76	188	188
Sublease Income	(348)	(338)	(1,014)	(998)
Lease, Cost	$ 12,604	6,341	$ 24,042	14,173
Weighted average remaining lease term
Operating leases	12 years 2 months 4 days		12 years 2 months 4 days		10 years 5 months 8 days
Finance leases	5 years 3 days		5 years 3 days		5 years 10 months 2 days
Weighted average discount rate
Operating leases	4.23%		4.23%		3.11%
Finance leases	7.22%		7.22%		7.22%
Operating lease payments	$ 11,790	5,859	$ 22,648	13,528
Financing cash flows related to finance leases	55	62	141	158
Finance Lease, Principal Payments	101	$ 94	250	233
Operating Leases
2023	8,944		8,944
2024	36,046		36,046
2025	33,787		33,787
2026	31,418		31,418
2027	30,316		30,316
Thereafter	252,829		252,829
Total	393,340		393,340
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(92,375)		(92,375)
Finance Leases
2023	127		127
2024	527		527
2025	527		527
2026	527		527
2027	527		527
Thereafter	440		440
Finance Lease, Liability, Payment, Due	2,675		2,675
Finance Lease, Liability, Undiscounted Excess Amount	$ (442)		$ (442)
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets		Other assets		Other assets
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities		Other liabilities		Other liabilities
Sale Leaseback Transaction Lease Expense First 12 Months	$ 17,000		$ 17,000
Proceeds from sales of software, premises and equipment			198,414	656
Sale and Leaseback Transaction, Gain (Loss), Net			85,700
Proceeds from sales of software, premises and equipment			198,414	$ 656
Sale Leaseback - Purchase Price
Finance Leases
Proceeds from sales of software, premises and equipment			198,200
Proceeds from sales of software, premises and equipment			198,200
Property, Plant and Equipment
Right of Use Assets [Abstract]
Right of Use Assets	294,161		294,161		$ 128,085
Lease Liabilities [Abstract]
Lease Liability	303,198		303,198		135,566
Land
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	33,176		33,176		71,741
Building
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 101,840		$ 101,840		206,434
Building | Minimum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	15 years		15 years
Building | Maximum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	30 years		30 years
Leaseholds and Leasehold Improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 70,755		$ 70,755		62,209
Leaseholds and Leasehold Improvements | Minimum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	14 years		14 years
Leaseholds and Leasehold Improvements | Maximum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	35 years		35 years
Furniture and Equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 181,972		$ 181,972		$ 144,979
Furniture and Equipment | Minimum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	3 years		3 years
Furniture and Equipment | Maximum
Property, Plant and Equipment [Line Items]
Range of Useful Lives	20 years		20 years