Loans and Allowance for Credit Losses on Loans - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Jan. 01, 2020	Dec. 31, 2019
Loans
2020	$ 815,951
2019	366,281
2018	236,293
2017	234,415
2016	182,908
2015 and Prior	402,879
Revolving	457,297
Total loan balance	2,696,024		$ 2,534,163
Balance to report	2,640,945		2,510,559
Loan classified as loss
Loans
Balance to report	0		0
Commercial
Loans
2020	437,220
2019	47,637
2018	36,883
2017	20,175
2016	13,695
2015 and Prior	16,359
Revolving	306,424
Total loan balance	878,393	$ 6,790
Commercial | Pass And Watch [Member]
Loans
2020	404,010
2019	47,578
2018	36,471
2017	19,571
2016	10,601
2015 and Prior	15,674
Revolving	292,448
Total loan balance	826,353
Commercial | Special Mention [Member]
Loans
2020	30,835
2016	320
Revolving	2,607
Total loan balance	33,762
Commercial | Substandard [Member]
Loans
2020	926
2018	72
2017	604
2016	2,596
2015 and Prior	624
Revolving	11,040
Total loan balance	15,862
Commercial | Substandard-Nonaccrual [Member]
Loans
2020	1,449
2019	59
2018	340
2016	178
2015 and Prior	61
Revolving	329
Total loan balance	2,416
CRE - owner occupied
Loans
2020	119,780
2019	79,830
2018	78,616
2017	62,271
2016	53,201
2015 and Prior	143,322
Revolving	16,443
Total loan balance	553,463	6,994
CRE - owner occupied | Pass And Watch [Member]
Loans
2020	78,779
2019	79,282
2018	78,384
2017	60,021
2016	52,486
2015 and Prior	140,208
Revolving	16,443
Total loan balance	505,603
CRE - owner occupied | Special Mention [Member]
Loans
2020	37,899
2018	232
2015 and Prior	2,619
Total loan balance	40,750
CRE - owner occupied | Substandard [Member]
Loans
2017	2,250
2016	715
2015 and Prior	466
Total loan balance	3,431
CRE - owner occupied | Substandard-Nonaccrual [Member]
Loans
2020	3,102
2019	548
2015 and Prior	29
Total loan balance	3,679
CRE - non-owner occupied
Loans
2020	149,222
2019	137,054
2018	79,821
2017	110,390
2016	64,615
2015 and Prior	180,789
Revolving	3,885
Total loan balance	725,776	11,672	$ 767,821
CRE - non-owner occupied | Pass And Watch [Member]
Loans
2020	101,876
2019	137,054
2018	78,019
2017	110,390
2016	60,316
2015 and Prior	175,221
Revolving	3,885
Total loan balance	666,761
CRE - non-owner occupied | Special Mention [Member]
Loans
2020	46,314
2018	1,802
2016	4,299
2015 and Prior	5,568
Total loan balance	57,983
CRE - non-owner occupied | Substandard [Member]
Loans
2020	1,032
Total loan balance	1,032
Land and construction
Loans
2020	70,927
2019	47,934
2018	14,255
2017	1,560
2015 and Prior	1,383
Revolving	2,225
Total loan balance	138,284	1,458
Land and construction | Pass And Watch [Member]
Loans
2020	60,938
2019	47,934
2018	14,255
2017	1,560
2015 and Prior	1,383
Revolving	2,225
Total loan balance	128,295
Land and construction | Special Mention [Member]
Loans
2020	8,406
Total loan balance	8,406
Land and construction | Substandard [Member]
Loans
2020	1,583
Total loan balance	1,583
Home equity
Loans
2020	276
2018	89
2015 and Prior	266
Revolving	112,048
Total loan balance	112,679	1,321
Home equity | Pass And Watch [Member]
Loans
2020	276
2018	89
Revolving	108,875
Total loan balance	109,240
Home equity | Special Mention [Member]
Loans
Revolving	1,718
Total loan balance	1,718
Home equity | Substandard [Member]
Loans
2015 and Prior	143
Revolving	680
Total loan balance	823
Home equity | Substandard-Nonaccrual [Member]
Loans
2015 and Prior	123
Revolving	775
Total loan balance	898
Multi-family
Loans
2020	22,974
2019	40,571
2018	18,628
2017	27,700
2016	16,401
2015 and Prior	42,518
Revolving	845
Total loan balance	169,637	1,253
Multi-family | Pass And Watch [Member]
Loans
2020	17,007
2019	40,571
2018	18,628
2017	27,700
2016	16,401
2015 and Prior	37,322
Revolving	845
Total loan balance	158,474
Multi-family | Special Mention [Member]
Loans
2020	5,967
2015 and Prior	5,196
Total loan balance	11,163
Residential mortgages
Loans
2020	15,455
2019	10,237
2018	4,970
2017	12,296
2016	34,861
2015 and Prior	17,214
Total loan balance	95,033	678
Residential mortgages | Pass And Watch [Member]
Loans
2020	8,607
2019	10,237
2018	4,970
2017	11,011
2016	34,304
2015 and Prior	15,889
Total loan balance	85,018
Residential mortgages | Special Mention [Member]
Loans
2020	6,848
2017	1,285
2016	557
2015 and Prior	1,061
Total loan balance	9,751
Residential mortgages | Substandard [Member]
Loans
2015 and Prior	264
Total loan balance	264
Consumer and other
Loans
2020	97
2019	3,018
2018	3,031
2017	23
2016	135
2015 and Prior	1,028
Revolving	15,427
Total loan balance	22,759	$ 1,689
Consumer and other | Pass And Watch [Member]
Loans
2020	16
2019	3,018
2018	1,567
2017	23
2016	135
2015 and Prior	1,028
Revolving	15,427
Total loan balance	21,214
Consumer and other | Special Mention [Member]
Loans
2020	81
Total loan balance	81
Consumer and other | Substandard-Nonaccrual [Member]
Loans
2018	1,464
Total loan balance	$ 1,464