Accounts Receivable and Allowance for Doubtful Accounts - (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Receivables [Abstract]
Accounts receivable – trade	$ 86,033		$ 105,373
Allowance for doubtful accounts	(266)		(306)
Accounts receivable, net	$ 85,767	$ 105,067	$ 105,067