Allowance For Credit Losses (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Allowance for Credit Loss, Writeoff, after Recovery [Abstract]
PPP loans originated [Line Items]	$ 248,900	$ 331,600
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	6,938,765	7,058,225
Loan balance	7,035,646	7,177,785
Financing Receivable, Allowance for Credit Loss	83,577	85,675	$ 86,886	$ 73,476	$ 61,503	$ 56,679
Off-Balance Sheet, Credit Loss, Liability	4,402	116
Deferred Tax Liabilities, Net		2,892
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	1,069,392	1,040,256
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss		6,090
Off-Balance Sheet, Credit Loss, Liability		3,866
Deferred Tax Liabilities, Net		(2,115)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ (7,956)
7000 Hotels, Rooming Houses, Camps and Other Lodging Places
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	123,843
Additional Reserve Pandemic Risk	1,397
Loan balance	193,900
7000 Hotels, Rooming Houses, Camps and Other Lodging Places | Financial Asset Originated
Financing Receivable, Allowance for Credit Loss [Line Items]
Additional Reserve Pandemic Risk	1,000
722110 Full-Service Restaurants
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	31,373
Additional Reserve Pandemic Risk	532
5331 Retail, Variety Stores
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	177,302
Additional Reserve Pandemic Risk	1,468
Hotels, Restaurants, Strip Shopping Total
Financing Receivable, Allowance for Credit Loss [Line Items]
Loans collectively evaluated for impairment	332,518
Additional Reserve Pandemic Risk	$ 3,397