Fair Value Measurements (Carrying Amount And Estimated Fair Value Of Assets And Liabilities) (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		$ 1,054,223	$ 1,206,164
Commercial loans, at fair value		1,550,000
Short-term borrowings		300,000
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Securities sold under agreements to repurchase		42	42
Short-term borrowings		300,000
Significant Other Observable Inputs (Level 2) [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		984,961	1,027,213
Interest rate swaps, liability		895	2,223
Demand and interest checking		4,734,352	5,205,010
Savings and money market		378,160	257,050
Senior debt		101,433	104,111
Significant Unobservable Inputs (Level 3) [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		69,262	178,951
Federal Home Loan Bank and Atlantic Central Bankers Bank stock		1,663	1,368
Commercial loans, at fair value		1,550,025	1,810,812	[1]
Loans, net of deferred loan fees and costs		3,129,602	2,650,613
Investment in unconsolidated entity			31,294
Assets held-for-sale from discontinued operations	[2]	87,904	113,650	[1]
Subordinated debentures		8,663	9,102
Carrying Amount [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		1,054,223	1,206,164
Federal Home Loan Bank and Atlantic Central Bankers Bank stock		1,663	1,368
Commercial loans, at fair value		1,550,025	1,810,812
Loans, net of deferred loan fees and costs		3,136,662	2,652,323
Investment in unconsolidated entity			31,294
Assets held-for-sale from discontinued operations		87,904	113,650
Interest rate swaps, liability		895	2,223
Demand and interest checking		4,734,352	5,205,010
Savings and money market		378,160	257,050
Senior debt		98,590	98,314
Subordinated debentures		13,401	13,401
Securities sold under agreements to repurchase		42	42
Short-term borrowings		300,000
Estimated Fair Value [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		1,054,223	1,206,164
Federal Home Loan Bank and Atlantic Central Bankers Bank stock		1,663	1,368
Commercial loans, at fair value		1,550,025	1,810,812
Loans, net of deferred loan fees and costs		3,129,602	2,650,613
Investment in unconsolidated entity			31,294
Assets held-for-sale from discontinued operations		87,904	113,650
Interest rate swaps, liability		895	2,223
Demand and interest checking		4,734,352	5,205,010
Savings and money market		378,160	257,050
Senior debt		101,433	104,111
Subordinated debentures		8,663	9,102
Securities sold under agreements to repurchase		42	$ 42
Short-term borrowings		$ 300,000

[1] Insurance liquidating trust preferred is a single debenture which is valued using discounted cash flow analysis. The discount rate used is based on the market rate on comparable relatively illiquid instruments and credit analysis. A change in the liquidating trust’s ability to repay the note, or an increase in interest rates, particularly for privately placed debentures, would affect the discount rate and thus the valuation. As a single security, the weighted average rate shown is the actual rate applied to the security.

[2] Assets held-for-sale from discontinued operations are valued using discounted cash flow by an independent valuation consultant using loan performance, other credit characteristics and market interest rate comparisons. Changes in those factors could change the valuation.