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Goodwill and Intangible Assets
3 Months Ended
Mar. 31, 2015
Goodwill [Line Items]  
Goodwill Disclosure
(4) Goodwill and Intangible Assets

Goodwill

Goodwill is the cost of an acquisition less the fair value of the net identifiable assets of the acquired business. The Company evaluates goodwill for impairment annually as of October 31, and whenever events or changes in circumstances indicate it is more likely than not that the fair value of a reporting unit is less than its carrying amount. The Company first assesses qualitative factors to evaluate whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as the basis for determining whether it is necessary to perform the two-step goodwill impairment test. The Company may elect to perform the two-step goodwill impairment test without completing a qualitative assessment. If a two-step goodwill impairment test is elected or required, the first step involves comparing the fair value of the reporting unit with its carrying amount. If the carrying amount of a reporting unit exceeds its fair value, the second step of the process involves comparing the implied fair value to the goodwill for that reporting unit. If the carrying value of the goodwill of a reporting unit exceeds the implied fair value of that goodwill, the excess of the carrying value over the implied fair value is recognized as an impairment loss. The Company performed its annual impairment test of goodwill as of the fourth quarter of 2014. Based on these assessments, no impairment of goodwill was required.

The table below provides a summary of the Company’s goodwill, by assigned reporting unit.
 
 
March 31,
2015
 
December 31,
 2014
 
 
(in millions)
Texas
 
$
1,168.2

 
$
1,168.2

Louisiana
 
786.8

 
786.8

Oklahoma
 
190.3

 
190.3

Crude and Condensate
 
137.8

 
112.5

Corporate
 
1,426.9

 
1,426.9

       Total
 
$
3,710.0

 
$
3,684.7



The change in goodwill is related to a $25.3 million increase in goodwill related to the LPC acquisition. See Note 3-Acquisitions for further discussion.

Intangible Assets

Intangible assets associated with customer relationships are amortized on a straight-line basis over the expected period of benefits of the customer relationships, which range from ten to twenty years.

The following table represents the Partnership's total purchased intangible assets for the periods stated (in millions):
 
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
March 31, 2015
 
 
 
 
 
 
Customer relationships
 
$
925.8

 
$
(48.2
)
 
$
877.6

December 31, 2014
 
 
 
 
 
 
Customer relationships
 
$
569.5

 
$
(36.5
)
 
$
533.0



The weighted average amortization period for intangible assets is 11.1 years. Amortization expense for intangibles was approximately $11.5 million and $1.9 million for the three months ended March 31, 2015 and 2014, respectively.

The following table summarizes the Partnership's estimated aggregate amortization expense for the next five years (in millions):
2015
$
51.7

2016
67.0

2017
67.0

2018
67.0

2019
66.1

Thereafter
558.8

Total
$
877.6