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.

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting 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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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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Cash inflow representing an adjustment to the purchase price of a previous acquisition.

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Goodwill and Other Intangible Assets, Net - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Adjustments to purchase price allocations		$ 800,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)	0	0
Amortization expense related to finite-lived intangible assets	11,100,000us-gaap_AmortizationOfIntangibleAssets	17,600,000us-gaap_AmortizationOfIntangibleAssets	10,200,000us-gaap_AmortizationOfIntangibleAssets
Customer relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average period (in years)	13 years 8 months 6 days
Proprietary technology [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average period (in years)	12 years 6 months 6 days
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted average period (in years)	11 years 4 months 7 days
Bornemann [Member]
Finite-Lived Intangible Assets [Line Items]
Adjustments to purchase price allocations	800,000
Proceeds from previous acquisition	$ 700,000