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Intangibles and Goodwill (Tables)
 9 Months Ended
Sep. 30, 2017
Acquired Finite-Lived Intangible Assets [Line Items]  
Schedule of Acquired Finite-Lived Intangible Assets by Major Class [Table Text Block]
The components of intangible assets as of September 30, 2017 and December 31, 2016 were as follows:
 
 
September 30, 2017
 
December 31, 2016
(in thousands)
 
Cost
 
Accumulated Amortization
 
Net
 
Cost
 
Accumulated Amortization
 
Net
Finite-lived intangible assets:
 
 
 
 
 
 
 
 
 
 
 
 
Acquired products rights(1)
 
$
216,690

 
$
(27,086
)
 
$
189,604

 
$
216,690

 
$
(10,834
)
 
$
205,856

Customer relationships(1) (2)
 
26,080

 
(3,077
)
 
23,003

 
23,880

 
(1,194
)
 
22,686

Acquired technology(2)
 
9,200

 
(255
)
 
8,945

 
—

 
—

 
—

Acquired trademarks(2)
 
570

 
(48
)
 
522

 
—

 
—

 
—

 
 
$
252,540

 
$
(30,466
)
 
$
222,074

 
$
240,570

 
$
(12,028
)
 
$
228,542

________________
(1) The Company acquired certain intangible assets as part of the Noden Transaction, as described further in Note 18.