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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2014
Goodwill And Other Intangible Assets [Abstract]  
Goodwill by Segment
Goodwill relates to the following segments (in thousands):
 
December 31,
2014
 
December 31,
2013
Crude
$
36,116

 
$
28,322

SemGas
13,052

 
23,839

SemMexico
9,158

 
9,860

Total Goodwill
$
58,326

 
$
62,021
Reconciliation of Goodwill
Changes in goodwill balances during the period from December 31, 2011 to December 31, 2014 are shown below (in thousands):
Balance, December 31, 2011
$
9,453

Currency translation adjustments
431

Balance, December 31, 2012
9,884

Barcas acquisition (Note 6)
28,322

MMGS acquisition (Note 6)
23,839

Currency translation adjustments
(24
)
Balance, December 31, 2013
62,021

Crude oil trucking asset acquisition (Note 6)
7,892

MMGS purchase price allocation adjustment (Note 6)
(10,787
)
Barcas purchase price allocation adjustment (Note 6)
(98
)
Currency translation adjustments
(702
)
Balance, December 31, 2014
$
58,326
Other Intangible Assets by Segment
Other intangible assets relate to the following segments (in thousands):
 
December 31,
2014
 
December 31,
2013
Crude
$
16,640

 
$
5,775

SemGas
152,383

 
163,144

SemMexico
4,016

 
5,888

Corporate and other
26

 
31

Total other intangible assets
$
173,065

 
$
174,838
Reconciliation of Other Intangible Assets
Changes in other intangible asset balances are shown below (in thousands):
Balance, December 31, 2011
$
8,950

Amortization
(2,017
)
Currency translation adjustments
652

Balance, December 31, 2012
7,585

Amortization
(6,018
)
Barcas acquisition (Note 6)
6,930

MMGS acquisition (Note 6)
166,332

Currency translation adjustments
9

Balance, December 31, 2013
174,838

Amortization
(15,875
)
Crude oil trucking asset acquisition (Note 6)
17,010

MMGS purchase price allocation adjustment (Note 6)
(2,313
)
Barcas purchase price allocation adjustment (Note 6)
(50
)
Currency translation adjustments
(545
)
Balance, December 31, 2014
$
173,065
Future Amortization of Other Intangible Assets
We estimate that future amortization of other intangible assets will be as follows (in thousands):
For year ending:
 
December 31, 2015
$
10,334

December 31, 2016
10,928

December 31, 2017
11,011

December 31, 2018
10,918

December 31, 2019
10,317

Thereafter
119,557

Total estimated amortization expense
$
173,065