Loans - Schedule of Amortized Cost Basis of Loans by Vintage, Credit Quality Indicator and Class of Loans Based on Recent Analysis Performed (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Financing Receivable Recorded Investment [Line Items]
Total	$ 5,491,240	$ 2,786,693
Residential [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	251,178
2019	196,232
2018	136,536
2017	131,073
2016	137,833
Prior	335,395
Revolving Loans	2,834
Total	1,191,081
Commercial [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	523,705
2019	465,423
2018	328,375
2017	363,222
2016	209,367
Prior	450,912
Revolving Loans	19,151
Total	2,360,155
Construction Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	107,203
2019	100,553
2018	90,103
2017	11,666
2016	2,911
Prior	148
Total	312,584
Commercial Loan Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2020	570,006
2019	147,204
2018	85,503
2017	45,073
2016	21,556
Prior	27,359
Revolving Loans	276,342
Total	1,173,043
Home Equity and Improvement Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2020	8,736
2019	7,483
2018	4,508
2017	7,963
2016	7,748
Prior	31,468
Revolving Loans	199,883
Total	267,789
Consumer Portfolio Segment | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2020	38,665
2019	37,699
2018	19,404
2017	10,607
2016	4,397
Prior	3,272
Revolving Loans	6,743
Total	120,787
PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2019	45
2018	2,378
2017	18,078
2016	4,535
Prior	27,963
Revolving Loans	12,802
Total	65,801
Pass [Member] | Residential [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	250,979
2019	196,158
2018	136,247
2017	130,759
2016	137,581
Prior	333,572
Revolving Loans	2,627
Total	1,187,923
Pass [Member] | Commercial [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	517,691
2019	457,905
2018	299,072
2017	300,573
2016	198,247
Prior	414,082
Revolving Loans	16,082
Total	2,203,652
Pass [Member] | Construction Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	101,616
2019	100,553
2018	82,972
2017	11,666
2016	2,911
Prior	148
Total	299,866
Pass [Member] | Commercial Loan Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2020	568,678
2019	144,977
2018	82,492
2017	42,421
2016	21,262
Prior	21,969
Revolving Loans	260,490
Total	1,142,289
Pass [Member] | Home Equity and Improvement Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2020	8,736
2019	7,483
2018	4,508
2017	7,963
2016	7,748
Prior	31,382
Revolving Loans	199,530
Total	267,350
Pass [Member] | Consumer Portfolio Segment | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2020	38,665
2019	37,601
2018	19,401
2017	10,607
2016	4,393
Prior	3,272
Revolving Loans	6,743
Total	120,682
Pass [Member] | PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2019	45
2018	2,378
2017	2,547
2016	1,524
Prior	18,998
Revolving Loans	1,337
Total	26,829
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Total	152,272	53,419
Special Mention [Member] | Residential [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	199
2017	62
2016	116
Prior	211
Revolving Loans	207
Total	795
Special Mention [Member] | Commercial [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	6,014
2019	7,239
2018	10,452
2017	60,712
2016	7,977
Prior	17,723
Revolving Loans	922
Total	111,039
Special Mention [Member] | Construction Portfolio Segment [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2020	5,587
2018	7,131
Total	12,718
Special Mention [Member] | Commercial Loan Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2020	1,180
2019	2,026
2018	2,514
2017	2,109
2016	37
Prior	5,121
Revolving Loans	10,920
Total	23,907
Special Mention [Member] | PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2017	1,160
2016	509
Prior	1,758
Revolving Loans	386
Total	3,813
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Total	90,377	$ 34,648
Substandard [Member] | Residential [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2019	74
2018	289
2017	252
2016	136
Prior	1,612
Total	2,363
Substandard [Member] | Commercial [Member] | Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
2019	279
2018	18,851
2017	1,937
2016	3,143
Prior	19,107
Revolving Loans	2,147
Total	45,464
Substandard [Member] | Commercial Loan Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2020	148
2019	201
2018	497
2017	543
2016	257
Prior	269
Revolving Loans	4,932
Total	6,847
Substandard [Member] | Home Equity and Improvement Portfolio Segment [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
Prior	86
Revolving Loans	353
Total	439
Substandard [Member] | Consumer Portfolio Segment | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2019	98
2018	3
2016	4
Total	105
Substandard [Member] | PCD [Member] | Other Loans [Member]
Financing Receivable Recorded Investment [Line Items]
2017	14,371
2016	2,502
Prior	7,207
Revolving Loans	11,079
Total	$ 35,159