Notes Receivable and Allowance for Credit Losses - Schedule Of Notes Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 140,022	$ 133,014
Total allowance for notes receivable losses	13,102	4,556	$ 4,685
Net carrying value	126,920	128,458
Current portion, net	24,161	25,404
Long-term portion, net	102,759	103,054
Senior
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	104,924	98,545
Subordinated
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	32,643	32,153
Unsecured
Notes Receivable and Allowance for Losses [Line Items]
Notes receivable	$ 2,455	$ 2,316