Commitments and Contingencies - Legal Proceedings (Details) $ in Millions		3 Months Ended	12 Months Ended
	Jul. 16, 2018 USD ($) item	Mar. 31, 2020	Dec. 31, 2019	Dec. 07, 2011 item director
Series B 9.375% redeemable preferred stock
Repurchase reserve
Preferred stock, dividend rate (as a percent)		9.375%	9.375%
Series C 9.125% redeemable preferred stock
Repurchase reserve
Preferred stock, dividend rate (as a percent)		9.125%	9.125%
Timm
Repurchase reserve
Number of directors elected by Preferred holders | director				2
Number of days within which special election for election of directors to be held	60 days
Number of quarterly dividend payments sought for Preferred holders				2
Number of quarterly dividends payments granted under judgement for Preferred holders	3
Dividend amount required to be paid by company in three quarterly payment | $	$ 1.2