LOANS - Summary of Delinquent and Nonaccrual Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Past Due and Still Accruing	$ 11,084	$ 8,330
Total loans		6,906,728
Total	$ 8,938,841	$ 6,906,728
Percentage of Total Loans Due Nonaccrual	0.12%	0.12%
Financial Asset, Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 19,773	$ 13,656
Percentage of Total Loans	0.22%	0.20%
30-59 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 3,405	$ 4,756
Percentage of Total Loans Due 30-59 Days	0.04%	0.07%
60-89 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 2,407	$ 570
Percentage of Total Loans Due 60-89 Days	0.03%	0.01%
90 Days or More
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 2,877
Percentage of Total Loans Due 90 Days or More	0.03%
Financial Asset, Not Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 8,919,068	$ 6,893,072
Residential Properties
Accounts Notes And Loans Receivable [Line Items]
Total loans		2,896,743
Total	4,928,374	3,832,495
Commercial real estate
Accounts Notes And Loans Receivable [Line Items]
Total loans		1,309,575
Total	1,236,165	1,309,575
Land and Construction
Accounts Notes And Loans Receivable [Line Items]
Total loans		155,926
Total	169,722	155,926
Commercial and Industrial Loans
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Past Due and Still Accruing	3,684	3,520
Total loans		1,597,865
Total	2,593,726	1,597,865
Commercial and Industrial Loans | Financial Asset, Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	6,571	4,083
Commercial and Industrial Loans | 30-59 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans	823	303
Commercial and Industrial Loans | 60-89 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,064	260
Commercial and Industrial Loans | Financial Asset, Not Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,587,155	1,593,782
Consumer Loans
Accounts Notes And Loans Receivable [Line Items]
Total loans		10,867
Total	10,854	10,867
Consumer Loans | Financial Asset, Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	170
Consumer Loans | 30-59 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans	170
Consumer Loans | Financial Asset, Not Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	10,684	10,867
Real Estate Loans | Residential Properties
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Past Due and Still Accruing	3,154	3,281
Total	4,928,374	3,832,495
Real Estate Loans | Residential Properties | Financial Asset, Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	3,634	5,110
Real Estate Loans | Residential Properties | 30-59 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans	480	1,519
Real Estate Loans | Residential Properties | 60-89 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans		310
Real Estate Loans | Residential Properties | Financial Asset, Not Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	4,924,740	3,827,385
Real Estate Loans | Commercial real estate
Accounts Notes And Loans Receivable [Line Items]
Nonaccrual Past Due and Still Accruing	4,246	1,529
Total	1,236,165	1,309,575
Real Estate Loans | Commercial real estate | Financial Asset, Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	9,398	4,463
Real Estate Loans | Commercial real estate | 30-59 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,932	2,934
Real Estate Loans | Commercial real estate | 60-89 Days
Accounts Notes And Loans Receivable [Line Items]
Total loans	343
Real Estate Loans | Commercial real estate | 90 Days or More
Accounts Notes And Loans Receivable [Line Items]
Total loans	2,877
Real Estate Loans | Commercial real estate | Financial Asset, Not Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	1,226,767	1,305,112
Real Estate Loans | Land and Construction
Accounts Notes And Loans Receivable [Line Items]
Total	169,722	155,926
Real Estate Loans | Land and Construction | Financial Asset, Not Past Due
Accounts Notes And Loans Receivable [Line Items]
Total loans	$ 169,722	$ 155,926