Fair Value Measurements (Assets Measured At Fair Value On A Recurring And Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Assets measured at fair value on a recurring basis [Abstract]
Fair value	$ 1,274,417	$ 1,294,484
Assets measured on a nonrecurring basis [Abstract]
Impaired loans - collateral dependent	6,200
Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
U.S. Government agency securities	53,963	49,902
Asset-backed securities	206,228	270,085
Obligations of states and political subdivisions	67,906	75,849
Residential mortgage-backed securities	380,489	448,852
Collaterized mortgage obligation securities	266,449	246,493
Commercial mortgage-backed securities	299,382	203,303
Fair value	1,274,417	1,294,484
Commercial loans held for sale	308,470	503,316
Investment in unconsolidated entity	64,212	74,473
Assets held for sale from discontinued operations	226,026	304,313
Interest rate swaps, asset	2,830	1,243
Total assets	1,875,955	2,177,829
Fair Value, Measurements, Nonrecurring [Member]
Assets measured on a nonrecurring basis [Abstract]
Impaired loans - collateral dependent	4,063	3,559
Other real estate owned	405	450
Intangible assets	4,229	5,377
Assets nonrecurring	8,697	9,386
Significant Other Observable Inputs (Level 2) [Member]
Assets measured at fair value on a recurring basis [Abstract]
Fair value	1,222,371	1,253,840
Interest rate swaps, asset	2,830	1,243
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
U.S. Government agency securities	53,963	49,902
Asset-backed securities	206,228	270,085
Obligations of states and political subdivisions	67,906	75,849
Residential mortgage-backed securities	380,489	448,852
Collaterized mortgage obligation securities	266,449	246,493
Commercial mortgage-backed securities	247,336	162,659
Fair value	1,222,371	1,253,840
Interest rate swaps, asset	2,830	1,243
Total assets	1,225,201	1,255,083
Significant Unobservable Inputs (Level 3) [Member]
Assets measured at fair value on a recurring basis [Abstract]
Fair value	52,046	40,644
Commercial loans held for sale	308,470	503,316
Investment in unconsolidated entity	64,212	74,473
Assets held for sale from discontinued operations	226,026	304,313
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
Commercial mortgage-backed securities	52,046	40,644
Fair value	52,046	40,644
Commercial loans held for sale	308,470	503,316
Investment in unconsolidated entity	64,212	74,473
Assets held for sale from discontinued operations	226,026	304,313
Total assets	650,754	922,746
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured on a nonrecurring basis [Abstract]
Impaired loans - collateral dependent	4,063	3,559
Other real estate owned	405	450
Intangible assets	4,229	5,377
Assets nonrecurring	$ 8,697	$ 9,386