Accounts Receivable - Accounts Receivable (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for doubtful accounts	$ (605)	$ (559)
Total accounts receivable, net	181,658	199,284
Accounts receivable, trade
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	142,181	146,056
Accounts receivable, other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 40,082	$ 53,787