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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets:

Goodwill and other indefinite-lived intangible assets, including trade-names are reviewed for impairment annually, or more frequently if indicators of impairment exist. The Partnership performed its annual impairment test as of the first days of the fourth quarter in 2017 and 2016, respectively, and concluded there was no impairment of the carrying value of goodwill or other indefinite-lived intangible assets in either period.

A summary of changes in the Partnership's carrying value of goodwill for the years ended December 31, 2017 and December 31, 2016 is as follows:
(In thousands)
 
Goodwill
(gross)
 
Accumulated
Impairment
Losses
 
Goodwill
(net)
Balance at December 31, 2015
 
$
290,679

 
$
(79,868
)
 
$
210,811

Deferred income tax adjustment related to Canadian disregarded entity (1)
 
(33,945
)
 

 
(33,945
)
Foreign currency exchange translation
 
2,794

 

 
2,794

Balance at December 31, 2016
 
259,528

 
(79,868
)
 
179,660

Foreign currency exchange translation
 
4,170

 

 
4,170

Balance at December 31, 2017
 
$
263,698

 
$
(79,868
)
 
$
183,830



(1)
See Note 9 to the Consolidated Financial Statements.

As of December 31, 2017 and December 31, 2016, the Partnership's other intangible assets consisted of the following:
(In thousands)
 
Weighted Average Amortization Period
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Value
December 31, 2017
 
 
 
 
 
 
 
 
Other intangible assets:
 
 
 
 
 
 
 
 
Trade names
 

 
$
36,531

 
$

 
$
36,531

License / franchise agreements
 
5.9 years

 
3,360

 
(1,827
)
 
1,533

Total other intangible assets
 
 
 
$
39,891

 
$
(1,827
)
 
$
38,064

 
 
 
 
 
 
 
 
 
December 31, 2016
 
 
 
 
 
 
 
 
Other intangible assets:
 
 
 
 
 
 
 
 
Trade names
 

 
$
35,603

 
$

 
$
35,603

License / franchise agreements
 
5.4 years

 
3,326

 
(1,092
)
 
2,234

Total other intangible assets
 
 
 
$
38,929

 
$
(1,092
)
 
$
37,837



Amortization expense of other intangible assets for 2017, 2016 and 2015 was immaterial and is expected to be immaterial going forward.