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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2012
Goodwill And Other Intangible Assets [Abstract]  
Goodwill by Segment
Goodwill relates to the following segment (in thousands):
 
December 31,
2012
 
December 31,
2011
SemMexico
$
9,884

 
$
9,453
Reconciliation of Goodwill
Changes in goodwill balances during the period from December 31, 2009 to December 31, 2012 are shown below (in thousands):
Balance, December 31, 2009
$
186,844

Impairments (Note 6)
(61,173
)
Deconsolidation of White Cliffs (Note 5)
(17,000
)
Currency translation adjustments
(848
)
Balance, December 31, 2010
107,823

Impairments (Note 6)
(47,804
)
Contribution of SemStream assets to NGL Energy (Note 5)
(50,071
)
Currency translation adjustments
(495
)
Balance, December 31, 2011
9,453

Currency translation adjustments
431

Balance, December 31, 2012
$
9,884
Other Intangible Assets by Segment
Other intangible assets relate to the following segments (in thousands):
 
December 31,
2012
 
December 31,
2011
SemMexico
$
7,549

 
$
8,907

Corporate and other
36

 
43

Total
$
7,585

 
$
8,950
Reconciliation of Other Intangible Assets
Changes in other intangible asset balances are shown below (in thousands):
Balance, December 31, 2009
$
130,612

Amortization
(16,181
)
Impairment (Note 6)
(39,446
)
Deconsolidation of White Cliffs (Note 5)
(43,267
)
Currency translation adjustments
546

Balance, December 31, 2010
32,264

Amortization
(4,664
)
Contribution of SemStream assets to NGL Energy (Note 5)
(12,408
)
Impairment (Note 6)
(5,048
)
Currency translation adjustments
(1,194
)
Balance, December 31, 2011
8,950

Amortization
(2,017
)
Currency translation adjustments
652

Balance, December 31, 2012
$
7,585
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, 2013
$
1,676

December 31, 2014
1,332

December 31, 2015
1,060

December 31, 2016
847

December 31, 2017
679

Thereafter
1,991

Total estimated amortization expense
$
7,585