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ESOP - Narrative (Details) - USD ($)
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]    
Shares in ESOP 2,281,800  
Price per share, ESOP (in usd per share) $ 10  
Purchase of common shares by the ESOP $ 0  
ESOP expense $ 554,000 $ 0