Accounts Receivable - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable and Allowance for Doubtful Accounts [Abstract]
Accounts Receivable Gross Current	$ 386,100	$ 387,700
Business Combination, Acquired Receivables, Estimated Uncollectible		5,000
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for Doubtful Accounts	$ 3,582	$ 1,925	$ 493
Reclassification Of Allowance For Doubtful Accounts, Other Assets			$ 300