Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation (Summary of Liability for Cash-Settled RSU Awards) (Details)

v3.10.0.1
Share-Based Compensation (Summary of Liability for Cash-Settled RSU Awards) (Details) - Cash-settleable RSU awards - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Cash-settleable RSU awards (current) $ 1,390 $ 4,621
Cash-settleable RSU awards (non-current) 2,067 3,490
Total cash-settleable RSU awards $ 3,457 $ 8,111