Allowance For Credit Losses (Financing Receivable, Credit Quality Indicators) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Financing Receivable, Credit Quality Indicator [Line Items]
Total	$ 3,665,596	$ 3,618,825	$ 3,616,099
Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	75,126
2019	75,551
2018	64,964
2017	39,136
2016	18,906
Prior	14,343
Revolving Loans, Amortized Cost Basis	81,096
Total	369,122		308,015
Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	172,961
2019	350,709
2018	206,124
2017	170,086
2016	174,717
Prior	365,564
Revolving Loans, Amortized Cost Basis	27,512
Total	1,467,673		1,459,737
1-4 Family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	19,584
2019	21,638
2018	10,445
2017	9,664
2016	7,361
Prior	45,381
Revolving Loans, Amortized Cost Basis	9,741
Total	123,814
Hotels
Financing Receivable, Credit Quality Indicator [Line Items]
2020	14,655
2019	110,833
2018	35,038
2017	49,483
2016	26,044
Prior	59,126
Revolving Loans, Amortized Cost Basis	0
Total	295,179
Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	57,954
2019	59,080
2018	3,397
2017	22,528
2016	32,957
Prior	27,894
Revolving Loans, Amortized Cost Basis	770
Total	204,580
Non Residential Non-Owner Occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020	69,531
2019	121,206
2018	123,203
2017	58,525
2016	82,479
Prior	162,126
Revolving Loans, Amortized Cost Basis	11,558
Total	628,628
Non Residential Owner Occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020	11,238
2019	37,953
2018	34,040
2017	29,886
2016	25,875
Prior	71,040
Revolving Loans, Amortized Cost Basis	5,440
Total	215,472
Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	197,377
2019	281,732
2018	223,330
2017	165,561
2016	129,660
Prior	510,295
Revolving Loans, Amortized Cost Basis	123,196
Total	1,631,151		1,640,396
Residential real estate | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2020	197,377
2019	281,064
2018	223,330
2017	165,437
2016	129,448
Prior	507,921
Revolving Loans, Amortized Cost Basis	123,143
Total	1,627,720
Residential real estate | Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	668
2018	0
2017	124
2016	212
Prior	2,374
Revolving Loans, Amortized Cost Basis	53
Total	3,431
Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,054
2019	7,570
2018	7,121
2017	2,733
2016	2,121
Prior	12,861
Revolving Loans, Amortized Cost Basis	105,212
Total	142,672		148,928
Home equity | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2020	5,054
2019	7,570
2018	7,121
2017	2,733
2016	2,121
Prior	12,861
Revolving Loans, Amortized Cost Basis	105,047
Total	142,507
Home equity | Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving Loans, Amortized Cost Basis	165
Total	165
Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
2020	9,689
2019	18,922
2018	12,199
2017	4,492
2016	2,485
Prior	2,284
Revolving Loans, Amortized Cost Basis	2,207
Total	52,278		54,263
Consumer | Performing
Financing Receivable, Credit Quality Indicator [Line Items]
2020	9,689
2019	18,922
2018	12,199
2017	4,492
2016	2,485
Prior	2,284
Revolving Loans, Amortized Cost Basis	2,207
Total	52,278
Consumer | Non-performing
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	0
Revolving Loans, Amortized Cost Basis	0
Total	0
Noncommercial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total			1,843,587
Commercial Industrial Loans And Commercial Real Estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total			1,767,752
Pass
Financing Receivable, Credit Quality Indicator [Line Items]
Total			1,685,491
Pass | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	74,977
2019	74,675
2018	63,750
2017	38,259
2016	10,177
Prior	11,707
Revolving Loans, Amortized Cost Basis	62,386
Total	335,931		276,847
Pass | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	172,741
2019	343,898
2018	200,306
2017	165,468
2016	164,439
Prior	346,209
Revolving Loans, Amortized Cost Basis	27,105
Total	1,420,166		1,408,644
Pass | 1-4 Family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	19,584
2019	21,409
2018	10,445
2017	8,686
2016	6,918
Prior	37,060
Revolving Loans, Amortized Cost Basis	9,734
Total	113,836
Pass | Hotels
Financing Receivable, Credit Quality Indicator [Line Items]
2020	14,655
2019	110,833
2018	35,038
2017	49,483
2016	21,518
Prior	56,378
Revolving Loans, Amortized Cost Basis	0
Total	287,905
Pass | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	57,954
2019	57,159
2018	2,836
2017	22,528
2016	32,957
Prior	27,812
Revolving Loans, Amortized Cost Basis	770
Total	202,016
Pass | Non Residential Non-Owner Occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020	69,473
2019	120,792
2018	121,420
2017	57,873
2016	81,033
Prior	160,184
Revolving Loans, Amortized Cost Basis	11,318
Total	622,093
Pass | Non Residential Owner Occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020	11,076
2019	33,705
2018	30,567
2017	26,899
2016	22,012
Prior	64,777
Revolving Loans, Amortized Cost Basis	5,279
Total	194,315
Special mention
Financing Receivable, Credit Quality Indicator [Line Items]
Total			16,310
Special mention | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	85
2019	46
2018	18
2017	61
2016	0
Prior	441
Revolving Loans, Amortized Cost Basis	211
Total	862		2,472
Special mention | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	5,156
2018	1,222
2017	691
2016	359
Prior	6,211
Revolving Loans, Amortized Cost Basis	0
Total	13,639		13,838
Special mention | 1-4 Family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	26
2016	334
Prior	3,053
Revolving Loans, Amortized Cost Basis	0
Total	3,413
Special mention | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	1,921
2018	561
2017	0
2016	0
Prior	0
Revolving Loans, Amortized Cost Basis	0
Total	2,482
Special mention | Non Residential Non-Owner Occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	316
2018	602
2017	574
2016	0
Prior	595
Revolving Loans, Amortized Cost Basis	0
Total	2,087
Special mention | Non Residential Owner Occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	2,919
2018	58
2017	91
2016	24
Prior	2,563
Revolving Loans, Amortized Cost Basis	0
Total	5,655
Substandard
Financing Receivable, Credit Quality Indicator [Line Items]
Total			65,951
Substandard | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
2020	64
2019	830
2018	1,196
2017	816
2016	8,729
Prior	2,195
Revolving Loans, Amortized Cost Basis	18,499
Total	32,329		28,696
Substandard | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
2020	220
2019	1,655
2018	4,596
2017	3,927
2016	9,919
Prior	13,144
Revolving Loans, Amortized Cost Basis	407
Total	33,868		37,255
Substandard | 1-4 Family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	229
2018	0
2017	952
2016	109
Prior	5,268
Revolving Loans, Amortized Cost Basis	7
Total	6,565
Substandard | Hotels
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	4,526
Prior	2,748
Revolving Loans, Amortized Cost Basis	0
Total	7,274
Substandard | Multi-family
Financing Receivable, Credit Quality Indicator [Line Items]
2020	0
2019	0
2018	0
2017	0
2016	0
Prior	82
Revolving Loans, Amortized Cost Basis	0
Total	82
Substandard | Non Residential Non-Owner Occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020	58
2019	98
2018	1,181
2017	78
2016	1,446
Prior	1,347
Revolving Loans, Amortized Cost Basis	240
Total	4,448
Substandard | Non Residential Owner Occupied
Financing Receivable, Credit Quality Indicator [Line Items]
2020	162
2019	1,329
2018	3,415
2017	2,896
2016	3,839
Prior	3,700
Revolving Loans, Amortized Cost Basis	161
Total	$ 15,502
Non-performing | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total			3,476
Non-performing | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Total			531
Non-performing | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total			0
Non-performing | Noncommercial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total			4,007
Performing | Residential real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Total			1,636,920
Performing | Home equity
Financing Receivable, Credit Quality Indicator [Line Items]
Total			148,397
Performing | Consumer
Financing Receivable, Credit Quality Indicator [Line Items]
Total			54,263
Performing | Noncommercial Loans
Financing Receivable, Credit Quality Indicator [Line Items]
Total			$ 1,839,580