Allowance For Credit Losses (Financing Receivable, Past Due) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Current	$ 3,603,069		$ 3,604,703
Financing receivable, recorded investment, past due	9,981		11,396
Gross loans	3,613,050	$ 3,618,825	3,616,099
Commercial and industrial
Financing Receivable, Past Due [Line Items]
Current	308,496		307,557
Financing receivable, recorded investment, past due	71		458
Gross loans	308,567		308,015
Commercial real estate
Financing Receivable, Past Due [Line Items]
Current	1,469,928		1,458,157
Financing receivable, recorded investment, past due	1,021		1,580
Gross loans	1,470,949		1,459,737
1-4 Family
Financing Receivable, Past Due [Line Items]
Current	120,561
Financing receivable, recorded investment, past due	291
Gross loans	120,852
Hotels
Financing Receivable, Past Due [Line Items]
Current	294,072
Financing receivable, recorded investment, past due	0
Gross loans	294,072
Multi-family
Financing Receivable, Past Due [Line Items]
Current	205,684
Financing receivable, recorded investment, past due	0
Gross loans	205,684
Non Residential Non-Owner Occupied
Financing Receivable, Past Due [Line Items]
Current	627,674
Financing receivable, recorded investment, past due	178
Gross loans	627,852
Non Residential Owner Occupied
Financing Receivable, Past Due [Line Items]
Current	221,937
Financing receivable, recorded investment, past due	552
Gross loans	222,489
Residential real estate
Financing Receivable, Past Due [Line Items]
Current	1,621,763		1,632,912
Financing receivable, recorded investment, past due	7,815		7,484
Gross loans	1,629,578		1,640,396
Home equity
Financing Receivable, Past Due [Line Items]
Current	145,604		147,972
Financing receivable, recorded investment, past due	430		956
Gross loans	146,034		148,928
Consumer
Financing Receivable, Past Due [Line Items]
Current	54,572		54,075
Financing receivable, recorded investment, past due	177		188
Gross loans	54,749		54,263
DDA overdrafts
Financing Receivable, Past Due [Line Items]
Current	2,706		4,030
Financing receivable, recorded investment, past due	467		730
Gross loans	3,173		4,760
Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	7,720		9,155
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	53		243
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial real estate
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	1,018		1,514
Financial Asset, 30 to 59 Days Past Due [Member] | 1-4 Family
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	291
Financial Asset, 30 to 59 Days Past Due [Member] | Hotels
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, 30 to 59 Days Past Due [Member] | Multi-family
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, 30 to 59 Days Past Due [Member] | Non Residential Non-Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	175
Financial Asset, 30 to 59 Days Past Due [Member] | Non Residential Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	552
Financial Asset, 30 to 59 Days Past Due [Member] | Residential real estate
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	5,664		5,758
Financial Asset, 30 to 59 Days Past Due [Member] | Home equity
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	361		840
Financial Asset, 30 to 59 Days Past Due [Member] | Consumer
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	159		156
Financial Asset, 30 to 59 Days Past Due [Member] | DDA overdrafts
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	465		644
Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	2,235		1,974
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	18		31
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial real estate
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	3		66
Financial Asset, 60 to 89 Days Past Due [Member] | 1-4 Family
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Hotels
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Multi-family
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Non Residential Non-Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	3
Financial Asset, 60 to 89 Days Past Due [Member] | Non Residential Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, 60 to 89 Days Past Due [Member] | Residential real estate
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	2,125		1,643
Financial Asset, 60 to 89 Days Past Due [Member] | Home equity
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	69		116
Financial Asset, 60 to 89 Days Past Due [Member] | Consumer
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	18		32
Financial Asset, 60 to 89 Days Past Due [Member] | DDA overdrafts
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	2		86
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	26		267
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and industrial
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0		184
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial real estate
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | 1-4 Family
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Hotels
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Multi-family
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non Residential Non-Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Non Residential Owner Occupied
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential real estate
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	26		83
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Home equity
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	0		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | DDA overdrafts
Financing Receivable, Past Due [Line Items]
Financing receivable, recorded investment, past due	$ 0		$ 0