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Long-Term Debt - Additional Information (Detail)	3 Months Ended				3 Months Ended				3 Months Ended		3 Months Ended
	Mar. 31, 2014 USD ($)	Mar. 31, 2014 IKB Loan [Member] Installment	Apr. 11, 2013 IKB Loan [Member] USD ($)	Apr. 11, 2013 IKB Loan [Member] EUR (€)	Mar. 31, 2014 Maximum [Member]	Mar. 31, 2014 Federal Funds Rate [Member]	Mar. 31, 2014 5.375% Notes [Member]	Oct. 03, 2012 5.375% Notes [Member] USD ($)	Mar. 31, 2014 Revolving Credit Facility [Member]	Nov. 21, 2011 Revolving Credit Facility [Member] USD ($)	Mar. 31, 2014 Revolving Credit Facility, Due Nov. 2016 [Member]	Mar. 31, 2014 Revolving Credit Facility, Due Nov. 2016 [Member] Minimum [Member]	Mar. 31, 2014 Revolving Credit Facility, Due Nov. 2016 [Member] Maximum [Member]	Mar. 31, 2014 Revolving Credit Facility, Due Nov. 2016 [Member] Daily Euro Rate [Member] Minimum [Member]	Mar. 31, 2014 Revolving Credit Facility, Due Nov. 2016 [Member] Daily Euro Rate [Member] Maximum [Member]	Mar. 31, 2014 Letters of Credit [Member] USD ($)	Dec. 31, 2013 Letters of Credit [Member] USD ($)
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity										$ 350,000,000
Debt instrument maturity date							Oct. 15, 2020		Nov. 21, 2016		Nov. 30, 2016
Federal fund rate spread						0.50%						0.25%	1.25%	1.25%	2.25%
Margin over Euro-rate	1.00%
Leverage ratio	2.36				3.50
Aggregate principal amount			57,600,000	42,700,000				250,000,000
Percentage of aggregate principal amount of outstanding		2.05%					5.375%	5.375%
Net proceeds used to refinance previous debt	200,000,000
Frequency of interest payable							Semiannually
Number of installments		32
Installments beginning date		Jun. 30, 2015
Installments ending date		Mar. 31, 2023
Letters of credit issued																5,200,000	5,200,000
Letters of credit outstanding																$ 0

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- Definition

Amount of Letters of Credit Issued and Reducing Availability under Revolving Credit Facility

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Debt instrument number of installment payment.

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- Definition

Ratio of EBITDA over net debt.

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- Definition

Loan repayable installments end date.

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Loan repayable installments start date.

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Margin over Euro-rate.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

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Description of the frequency of periodic payments (monthly, quarterly, annual).

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

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