Basis of Presentation and Significant Accounting Policies - Net Accounts Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Accounts receivable	$ 701,946		$ 702,160
Allowance for doubtful accounts	(14,793)		(13,026)
Accounts receivable, net	$ 687,153	$ 689,134	$ 689,134