Share-Based Compensation (Summary of Liability for Cash-Settled RSU Awards) (Details) - Cash-Settled RSUs - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Other current liabilities	$ 231	$ 966
Other long-term liabilities	674	2,089
Total Cash-Settled RSU Awards	$ 905	$ 3,055

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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