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Intangibles and Goodwill (Notes)
9 Months Ended
Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block]
. Intangible Assets and Goodwill

Intangible Assets, Net

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. They are amortized on a straight-line basis over a weighted average period of 10.0 years.
(2) The Company acquired certain intangible assets as part of the LENSAR transaction, as described further in Note 18. They are amortized over a weighted average period of 15 years. The intangible assets for acquired technology and trademarks are being amortized over their estimated useful lives using the straight-line method of amortization. The intangible assets for customer relationships are being amortized using a double-declining method of amortization as such method better represents the economic benefits to be obtained.

Amortization expense for the nine months ended September 30, 2017 was $18.4 million.

Based on the intangible assets recorded at September 30, 2017, and assuming no subsequent additions to or impairment of the underlying assets, the remaining estimated amortization expense is expected to be as follows (in thousands):
Fiscal Year
 
Amount
2017 (Remaining three months)
 
$
6,251

2018
 
24,989

2019
 
24,969

2020
 
24,950

2021
 
24,934

2022
 
24,843

Thereafter
 
91,138

Total intangible assets acquired
 
$
222,074