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Restructuring (Tables)
 6 Months Ended
Jun. 30, 2017
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
The following table summarizes the activity in the restructuring liability (in thousands), resulting from the relocation of corporate headquarters to Irving, Texas as part of the Strategic Transformation:
 
Employee-Related Termination Costs
 
Contract Termination Costs
 
Fixed Asset Impairments
 
Stock-Based Compensation
 
Other Costs
 
Total
Balance as of December 31, 2016
$
4,234

 
$
—

 
$
—

 
$
—

 
$
—

 
$
4,234

Restructuring charges
(30
)
 
(241
)
 
1,878

 
981

 
32

 
2,620

Payments
(434
)
 
(161
)
 
—

 
—

 
(32
)
 
(627
)
Non-cash
—

 
1,457

 
(1,878
)
 
(981
)
 
—

 
(1,402
)
Balance as of June 30, 2017
$
3,770

 
$
1,055

 
$
—

 
$
—

 
$
—

 
$
4,825