Accounts Receivable (Details 1) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Accounts and Financing Receivable, after Allowance for Credit Loss [Abstract]
Receivable from contracts with customers, less estimated credit losses	$ 495,443	$ 519,577
Other receivables	19,777	17,579
Accounts receivable, net	515,220	537,156
Estimated credit losses	$ 21,126	$ 21,494