Business Combinations - Purchased Credit Impaired Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Aug. 21, 2020	Mar. 31, 2020	Mar. 13, 2020
First Bank of the Palm Beaches
Business Acquisition [Line Items]
Total PCD loans acquired				$ 146,777
Fourth Street Banking Company
Business Acquisition [Line Items]
Total PCD loans acquired		$ 303,434
PCD Loans | First Bank of the Palm Beaches
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 PCD loans acquired			$ 43,000	$ 43,038
PCD Loans | Fourth Street Banking Company
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 PCD loans acquired	$ 49,400	$ 49,373