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Equity - Capital Purchase Program, Additional Information (Details) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Class of Warrant or Right [Line Items]    
Warrant exercise price (in USD per share)   $ 8.836
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right   1.1
Warrant    
Class of Warrant or Right [Line Items]    
Warrants exercised (in shares) 1,900,000 300,000