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Non-operating (loss) income (Tables)
6 Months Ended
Jun. 30, 2019
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,
 
2019
 
2018
 
2019
 
2018
 
(In thousands)
Interest income
$
7,228

 
$
6,583

 
$
14,588

 
$
14,071

Transition services income
4,050

 

 
8,100

 

Loss on extinguishment of Subordinated Convertible Debentures

 
(6,554
)
 

 
(6,554
)
Other, net
158

 
631

 
951

 
947

Total non-operating income, net
$
11,436

 
$
660

 
$
23,639

 
$
8,464