Loans - Financing Receivable Credit Quality Indicators (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	$ 5,491,240	$ 2,786,693
Unclassified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	5,248,591	2,698,626
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	152,272	53,419
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	90,377	34,648
Total Classified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	90,377	34,648
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,191,081	326,144
Residential Real Estate [Member] | Unclassified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,187,923	322,250
Residential Real Estate [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	795	415
Residential Real Estate [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	2,363	3,479
Residential Real Estate [Member] | Total Classified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	2,363	3,479
Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	2,360,155	1,512,359
Commercial Real Estate [Member] | Unclassified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	2,203,652	1,462,065
Commercial Real Estate [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	111,039	27,197
Commercial Real Estate [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	45,464	23,097
Commercial Real Estate [Member] | Total Classified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	45,464	23,097
Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	312,584	206,721
Construction Loans [Member] | Unclassified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	299,866	205,076
Construction Loans [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	12,718	1,645
Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,173,043	579,911
Commercial [Member] | Unclassified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	1,142,289	548,012
Commercial [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	23,907	24,162
Commercial [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	6,847	7,737
Commercial [Member] | Total Classified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	6,847	7,737
Home Equity and Improvement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	267,789	123,722
Home Equity and Improvement [Member] | Unclassified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	267,350	123,407
Home Equity and Improvement [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	439	315
Home Equity and Improvement [Member] | Total Classified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	439	315
PCD [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	65,801
PCD [Member] | Unclassified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	26,829
PCD [Member] | Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	3,813
PCD [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	35,159
PCD [Member] | Total Classified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	35,159
Consumer Finance [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	120,787	37,836
Consumer Finance [Member] | Unclassified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	120,682	37,816
Consumer Finance [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	105	20
Consumer Finance [Member] | Total Classified [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Net	$ 105	$ 20