Debt Financing (Details) - Cash Collateral Security Agreement - Standby Letters of Credit - USD ($) $ in Thousands	Jun. 19, 2019	Mar. 31, 2020	Dec. 31, 2019
Line of Credit Facility [Line Items]
Cash collateral, percentage of face amount of outstanding standby letters of credit	105.00%
Letters of credit, amount outstanding		$ 2,984	$ 2,461
Restricted cash		$ 3,133	$ 2,584
LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate (as percent)	2.50%