Supplemental Information to Statements of Cash Flows - Schedule of Supplemental Information to Statements of Cash Flows (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Supplemental Cash Flows [Line Items]
Restricted cash reserves	$ 5,300		$ 4,100
Rangers Sub I, LLC
Supplemental Cash Flows [Line Items]
Cash and cash equivalents	16,995	$ 13,294	19,572
Restricted cash reserves	5,342	4,111	4,147
Cash, cash equivalents, and restricted cash reserves	22,337	17,405	$ 23,719	$ 24,562
Interest paid	1,631	1,468
Interest Paid, Related Party	1,008	766
Income taxes refunded	(39)	0
Operating Lease, Payments	1,949	1,866
Accrued capital expenditures	$ 2,751	$ 2,050