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Non-operating income, net Non-operating income, net (Tables)
 12 Months Ended
Dec. 31, 2016
Non-operating (loss) income, net [Abstract]  
Schedule of Non-operating Income, net
The following table presents the components of Non-operating income (loss), net:
 
Year Ended December 31,
 
2016
 
2015
 
2014
 
(In thousands)
Unrealized gain (loss) on contingent interest derivative on Subordinated Convertible Debentures
2,402

 
(14,130
)
 
2,249

Interest income
6,191

 
2,128

 
922

Other, net
1,572

 
1,337

 
1,707

Total non-operating income (loss), net
$
10,165

 
$
(10,665
)
 
$
4,878