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Goodwill - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Aug. 30, 2013	Sep. 30, 2013 Chemsil and Chemtec [Member]	Aug. 30, 2013 Chemsil and Chemtec [Member]	Jun. 30, 2013 Strata [Member]	Sep. 30, 2013 Strata [Member]	Dec. 24, 2012 Strata [Member]
Business Acquisition [Line Items]
Voting equity interests acquired			100.00%			100.00%
Annual sales		$ 40
Date of acquisition		Aug. 30, 2013			Dec. 24, 2012
Purchase price of cash	51.2
Purchase price of common stock	6.2
Reduction in other net assets				$ 0.4

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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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