Revenue from Contract with Customers - Contract Balances (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Disaggregation of Revenue
Accounts receivable, trade	$ 138,623		$ 144,865
Contract liability with customer	9,400		11,400
Deferred revenue	5,783	$ 9,467
Deferred revenue recognized in earnings	7,735	$ 12,749
Contract with Customers
Disaggregation of Revenue
Accounts receivable, trade	$ 133,500		$ 139,400

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

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