Accounts Receivable and Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Receivables [Abstract]
Accounts receivable - trade	$ 112,667	$ 105,373
Allowance for doubtful accounts	(275)	(306)
Accounts receivable, net	$ 112,392	$ 105,067	$ 101,784