Business Combinations - Purchased Credit Impaired Loans (Details) - USD ($) $ in Thousands	Aug. 21, 2020	Mar. 13, 2020	Oct. 19, 2018
Fourth Street Banking Company
Business Acquisition [Line Items]
Total purchased credit-impaired loan acquired	$ 303,434
Fourth Street Banking Company | PCD Loans
Business Acquisition [Line Items]
Book balance of loans at acquisition	59,455
Allowance for credit losses at acquisition	(5,763)
Non-credit related discount	(4,319)
Total purchased credit-impaired loan acquired	$ 49,373
First Bank of The Palm Beaches
Business Acquisition [Line Items]
Total purchased credit-impaired loan acquired		$ 146,777
First Bank of The Palm Beaches | PCD Loans
Business Acquisition [Line Items]
Book balance of loans at acquisition		43,682
Allowance for credit losses at acquisition		(516)
Non-credit related discount		(128)
Total purchased credit-impaired loan acquired		$ 43,038
First Green Bancorp, Inc.
Business Acquisition [Line Items]
Total purchased credit-impaired loan acquired			$ 631,497
First Green Bancorp, Inc. | PCD Loans
Business Acquisition [Line Items]
Contractually required principal and interest			2,136
Non-accretable difference			(671)
Cash flows expected to be collected			1,465
Accretable yield			0
Total purchased credit-impaired loan acquired			$ 1,465