The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

+ References+ Details

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details

Goodwill and Intangibles - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		5 Months Ended	7 Months Ended	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	May 31, 2010	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charges and intangible					$ 2,787
Amortization expenses	3,891	3,833	319	8,982	15,456	15,601
Estimated Amortization Expenses	15,500				15,446
South America [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill impairment charges and intangible					$ 2,787