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Business Combinations - Estimates of Acquired Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Ace [Member] | Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 826
Weighted Average Estimated Useful Life (yrs)	10 years
Ace [Member] | Trademarks and tradenames [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	280
Weighted Average Estimated Useful Life (yrs)	15 years
Ace [Member] | Non-competition agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value
Weighted Average Estimated Useful Life (yrs)
U.S. Insulation [Member] | Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	546
Weighted Average Estimated Useful Life (yrs)	10 years
U.S. Insulation [Member] | Trademarks and tradenames [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	216
Weighted Average Estimated Useful Life (yrs)	15 years
U.S. Insulation [Member] | Non-competition agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Estimated Fair Value	$ 84
Weighted Average Estimated Useful Life (yrs)	5 years

X

- Details

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X

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

+ Details

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X

- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

No definition available.

+ Details

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