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Non-operating (loss) income (Tables)
3 Months Ended
Mar. 31, 2016
Non-operating (loss) income, net [Abstract]  
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
The following table presents the components of Non-operating income (loss), net:
 
Three Months Ended March 31,
 
2016
 
2015
 
(In thousands)
Unrealized gain (loss) on contingent interest derivative on Subordinated Convertible Debentures
$
1,065

 
$
(7,019
)
Interest income
1,042

 
259

Other, net
1,014

 
1,205

Total non-operating income (loss), net
$
3,121

 
$
(5,555
)