Revenue and Accounts Receivable - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Allowance for Credit Losses [Roll Forward]
Beginning Balance(1)	$ 7,881	$ 6,037
Accounts Receivable, Credit Loss Expense (Reversal)	474	1,353
Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease)	(2,770)	161
Ending Balance	6,895	$ 7,551
Accounting Standards Update 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Cumulative Effect on Retained Earnings, Net of Tax	$ 1,310