Summary of Significant Accounting Policies Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financial guarantee liability	$ 32,430		$ 15
Increase in reserve	$ 2,754	$ 956
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financial guarantee liability			17,935
Accounts receivable allowance			4,200
Finance receivable allowance			$ 4,000