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Non-operating (loss) income (Tables)
6 Months Ended
Jun. 30, 2017
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, net:
 
Three Months Ended June 30,
 
Six Months Ended June 30,
 
2017
 
2016
 
2017
 
2016
 
(In thousands)
Gain on sale of business
$
10,607

 
$

 
$
10,607

 
$

Interest income
3,309

 
1,522

 
5,554

 
2,564

Unrealized (loss) gain on contingent interest derivative on Subordinated Convertible Debentures

 
(94
)
 
(893
)
 
971

Other, net
86

 
281

 
35

 
1,295

Total non-operating income, net
$
14,002

 
$
1,709

 
$
15,303

 
$
4,830