Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets [Abstract]
Cash and Due from Banks	$ 144,507	$ 155,596
Money market instruments	74,673	214,878
Cash and cash equivalents	219,180	370,474
Debt Securities, Available-for-sale, Current	1,754,140	1,059,341
Other Investments and Securities, at Cost	61,268	65,465
Total investment securities	1,815,408	1,124,806
Total loans	6,871,122	7,177,785
Allowance for credit losses	83,197	85,675
Net loans	6,787,925	7,092,110
Bank Owned Life Insurance	215,792	216,225
Prepaid Expense, Current	144,124	103,523
Goodwill	159,595	159,595
Intangible Assets, Net (Excluding Goodwill)	7,462	9,260
Property, Plant and Equipment, Net	89,008	88,660
Amortization Method Qualified Affordable Housing Project Investments	58,711	56,024
Accrued Investment Income Receivable	23,413	24,926
Other real estate owned	775	1,431
Mortgage loan servicing rights	15,264	12,210
Operating Lease, Right-of-Use Asset	13,446	15,078
Other Assets, Miscellaneous	10,151	4,699
Other Assets	737,741	691,631
Assets, Total	9,560,254	9,279,021
Liabilities [Abstract]
Non-interest bearing	3,066,419	2,727,100
Interest-bearing Deposit Liabilities	4,838,109	4,845,258
Total deposits	7,904,528	7,572,358
Short-term Debt	238,786	342,230
Long-term Debt	0	32,500
Subordinated Debt	188,210	187,774
Total borrowings	426,996	562,504
Operating Lease, Liability	14,339	16,053
Interest Payable	3,116	3,860
Qualified Affordable Housing Project Investments, Commitment	28,484	29,298
Off-Balance Sheet, Credit Loss, Liability	4,282	116
Other Liabilities Unclassified	67,750	54,576
Other Liabilities, Total	117,971	103,903
Total liabilities	8,449,495	8,238,765
Commitments and Contingencies
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	461,800	460,687
Accumulated Other Comprehensive Income (Loss), Net of Tax	15,155	5,571
Retained Earnings (Accumulated Deficit)	776,294	704,764
Treasury Stock, Value	142,490	130,766
Total shareholders’ equity	1,110,759	1,040,256
Liabilities and Equity, Total	$ 9,560,254	$ 9,279,021