Income Taxes Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Deferred tax assets:
Allowance for credit losses	$ 65,481	$ 62,465
Tax credit carryforwards	5,146	27,192
State loss carryforwards	26,421	23,996
Lease Liability	21,264	21,034
Tax credit investments	11,186	11,203
Other accrued expenses	10,059	10,633
Deferred compensation	9,014	9,190
Stock-based compensation	4,681	3,499
Other	8,158	7,348
Total gross deferred tax assets	272,099	176,560
Deferred tax liabilities:
Equipment lease financing	26,560	41,049
Right-of-use-asset	19,276	18,671
Unrealized holding gains on AFS securities	0	10,432
Premises and equipment	5,775	9,151
MSRs	7,750	8,016
Acquisition premiums/discounts	5,492	5,466
Intangible assets	0	1,272
Postretirement and defined benefit plans	1,755	1,243
Other	14,507	13,492
Total gross deferred tax liabilities	81,115	108,792
Net deferred tax asset, before valuation allowance	190,984	67,768
Valuation allowance	(26,421)	(23,996)
Net deferred tax asset	164,563	43,772
State and local operating loss carryforwards	335,000	306,900
Tax credits and benefits	(27,154)	(28,141)	$ (32,940)
Deferred Tax Asset, Tax Deferred Expense, Reserve and Accrual, Unrealized Holding Loss on Securities	$ 110,689	$ 0