Regulatory Matters - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Broker-Dealer, Net Capital Requirement, SEC Regulation [Abstract]
Dividends paid by Bank to the Holding Company	$ 0	$ 162,000,000
Maximum percentage of credit to affiliate under federal reserve act	10.00%
Maximum percentage of credit to all affiliates under federal reserve act	20.00%