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Equity-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2015
EquityBasedCompensationTablesAbstract  
Nonvested Units Outstanding Table
 
 
Units
 
Weighted Average
Grant Date Fair
Value Per Unit
 
 
(In Thousands)
 
 
Nonvested units outstanding at December 31, 2014
 
263

 
$
21.89

Units granted(1)
 
261

 
21.39

Exercised/released
 
(50
)
 
20.49

Cancelled/forfeited
 
(73
)
 
22.24

Nonvested units outstanding at December 31, 2015
 
401

 
$
21.77