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Revenue from Contracts with Customers Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue, Major Customer [Line Items]
Amounts included in deferred revenue for performance obligations satisfied or partially satisfied									$ 3,000
Revenues	$ 198,632	$ 213,897	$ 221,666	$ 213,256	$ 199,477	$ 205,683	$ 197,010	$ 168,487
Accounts receivable, net	131,558				133,421				131,558	$ 133,421
Major Customer
Revenue, Major Customer [Line Items]
Revenues									93,100	0	$ 0
Accounts receivable, net	$ 0				$ 0				$ 0	$ 0
Credit Concentration Risk \| Major Customer
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage									10.00%	0.00%
Sales Revenue, Net \| Customer Concentration Risk \| Major Customer
Revenue, Major Customer [Line Items]
Concentration Risk, Percentage									11.00%	10.00%	0.00%