Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Total debt	$ 100,000	$ 123,000
Senior Credit Facility
Debt Instrument [Line Items]
Total debt	$ 100,000	$ 123,000
Weighted average interest rate	3.43%	4.71%
Letters of credit issued	$ 35,000	$ 37,400