Equity - Capital Purchase Program, Additional Information (Details) - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Warrant or Right [Line Items]
Warrant exercise price (in USD per share)		$ 8.836	$ 8.999
Class of Warrant or Right, Number of Securities Called by Each Warrant or Right		1.1	1.0
Warrant
Class of Warrant or Right [Line Items]
Warrants exercised (in shares)	1,900,000	300,000	1,800,000