Quarterly report pursuant to Section 13 or 15(d)

Share-Based Awards and Cash-Based Awards - Summary of Compensation Expense Related to Share-Based Awards and Cash-Based Awards (Details)

v3.10.0.1
Share-Based Awards and Cash-Based Awards - Summary of Compensation Expense Related to Share-Based Awards and Cash-Based Awards (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Share-based compensation charged to operating income $ 1,215 $ 2,412 $ 2,434 $ 4,340
Total charged to operating income 3,149 3,810 7,900 5,738
General And Administrative Expense        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Share-based compensation charged to operating income 1,215 2,412 2,434 4,340
Cash-based incentive compensation charged to operating income 1,391 1,004 4,063 1,004
Lease Operating Expense        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Cash-based incentive compensation charged to operating income $ 543 $ 394 $ 1,403 $ 394