Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets [Abstract]
Cash and Due from Banks	$ 155,596	$ 135,567
Money market instruments	214,878	24,389
Cash and cash equivalents	370,474	159,956
Available-for-sale Securities	1,059,341	1,209,701
Other Investments and Securities, at Cost	65,465	69,806
Investments	1,124,806	1,279,507
Total loans	7,177,785	6,501,404
Allowance for loan losses	85,675	56,679
Net loans	7,092,110	6,444,725
Bank Owned Life Insurance	216,225	212,529
Prepaid Expense, Current	103,523	101,990
Goodwill	159,595	159,595
Intangible Assets, Net (Excluding Goodwill)	9,260	11,523
Property, Plant and Equipment, Net	88,660	73,322
Amortization Method Qualified Affordable Housing Project Investments	56,024	53,070
Accrued Investment Income Receivable	24,926	24,217
Other real estate owned	1,431	4,029
Mortgage loan servicing rights	12,210	10,070
Operating Lease, Right-of-Use Asset	15,078	13,714
Other Assets, Miscellaneous	4,699	10,130
Other Assets	691,631	674,189
Assets	9,279,021	8,558,377
Liabilities [Abstract]
Non-interest bearing	2,727,100	1,959,935
Interest-bearing Deposit Liabilities	4,845,258	5,092,677
Total deposits	7,572,358	7,052,612
Short-term Debt	342,230	230,657
Long-term Debt	32,500	192,500
Subordinated Debt	187,774	15,000
Total borrowings	562,504	438,157
Operating Lease, Liability	16,053	14,482
Interest Payable	3,860	2,927
Qualified Affordable Housing Project Investments, Commitment	29,298	25,894
Other Liabilities Unclassified	54,692	55,291
Other Liabilities, Total	103,903	98,594
Total liabilities	8,238,765	7,589,363
Commitments and Contingencies
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Preferred Stock, Value, Issued	0	0
Common Stock, Value, Issued	460,687	459,389
Accumulated Other Comprehensive Income (Loss), Net of Tax	5,571	(9,589)
Retained Earnings (Accumulated Deficit)	704,764	646,847
Treasury Stock, Value	130,766	127,633
Total shareholders’ equity	1,040,256	969,014
Liabilities and Equity, Total	$ 9,279,021	$ 8,558,377