Revenue from Contract with Customers - Contract Balances (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Disaggregation of Revenue
Accounts receivable, trade	$ 124,587		$ 144,865
Contract liability with customer	6,900		11,400
Deferred revenue recognized in earnings	12,762	$ 25,227
Deferred revenue	8,253	$ 19,747
Contract with Customers
Disaggregation of Revenue
Accounts receivable, trade	$ 118,800		$ 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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