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Commitments and Contingencies (Tables)
 6 Months Ended
Jun. 30, 2016
Commitments and Contingencies Disclosure [Abstract]  
Restructuring and Related Costs
The following table summarizes activity related to liabilities associated with our restructuring activities for first six months 2016:
 
Severance Costs
 
Retention Bonuses
 
Total
 
(In thousands)
Balance at year-end 2015
$
(1,049
)
 
$
—

 
$
(1,049
)
Additions
(2,072
)
 
(796
)
 
(2,868
)
Payments
3,121

 
620

 
3,741

Balance at second quarter-end 2016
$
—

 
$
(176
)
 
$
(176
)