Fair Value Measurements (Carrying Amount And Estimated Fair Value Of Assets And Liabilities) (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		$ 1,264,903	$ 1,320,692
Investment securities, held-to-maturity			84,387
Commercial loans, at fair value		1,850
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	82
Significant Other Observable Inputs (Level 2) [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		1,080,555	1,203,359
Investment securities, held-to-maturity			75,850
Interest rate swaps, liability		2,465	232
Demand and interest checking		4,882,834	4,402,740
Savings and money market		505,928	174,290
Senior debt		101,910
Significant Unobservable Inputs (Level 3) [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		184,348	117,333
Investment securities, held-to-maturity			7,152
Federal Home Loan Bank and Atlantic Central Bankers Bank stock		1,368	5,342
Commercial loans, at fair value		1,849,947	1,180,546
Loans, net of deferred loan fees and costs		2,486,275	1,826,154
Investment in unconsolidated entity		31,783	39,154
Assets held-for-sale from discontinued operations	[1]	122,253	140,657
Time deposits			475,000
Subordinated debentures		8,235	9,736
Carrying Amount [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		1,264,903	1,320,692
Investment securities, held-to-maturity			84,387
Federal Home Loan Bank and Atlantic Central Bankers Bank stock		1,368	5,342
Commercial loans, at fair value		1,849,947	1,180,546
Loans, net of deferred loan fees and costs		2,488,760	1,824,245
Investment in unconsolidated entity		31,783	39,154
Assets held-for-sale from discontinued operations		122,253	140,657
Interest rate swaps, liability		2,465	232
Demand and interest checking		4,882,834	4,402,740
Savings and money market		505,928	174,290
Time deposits			475,000
Senior debt		98,222
Subordinated debentures		13,401	13,401
Securities sold under agreements to repurchase		42	82
Estimated Fair Value [Member]
Carrying amount and estimated fair value of assets and liabilities [Abstract]
Investment securities available-for-sale		1,264,903	1,320,692
Investment securities, held-to-maturity			83,002
Federal Home Loan Bank and Atlantic Central Bankers Bank stock		1,368	5,342
Commercial loans, at fair value		1,849,947	1,180,546
Loans, net of deferred loan fees and costs		2,486,275	1,826,154
Investment in unconsolidated entity		31,783	39,154
Assets held-for-sale from discontinued operations		122,253	140,657
Interest rate swaps, liability		2,465	232
Demand and interest checking		4,882,834	4,402,740
Savings and money market		505,928	174,290
Time deposits			475,000
Senior debt		101,910
Subordinated debentures		8,235	9,736
Securities sold under agreements to repurchase		$ 42	$ 82

[1] 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.