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Selected Financial Information (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Quarterly Financial Data [Line Items]
Goodwill impairment		$ (56,283)							$ (56,283)		$ (30,932)
Gain on asset dispositions, net	$ 2,363	$ 7,170	$ 49	$ 2,140	$ 3,839	$ 99	$ 1,833	$ 838	$ 11,722	$ 6,609	$ 17,657

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- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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