Future Principal Payments Under Term Loan Arrangements (Detail) (Term Loan Facility, USD $) In Millions, unless otherwise specified	Mar. 31, 2013
Term Loan Facility
Long Term Debt Maturities Estimated Repayments Of Principal [Line Items]
Future minimum payments remainder of 2013	$ 5.9
Future minimum payments in 2014	7.9
Future minimum payments in 2015	7.9
Future minimum payments in 2016	7.9
Future minimum payments in 2017	7.9
Future minimum payments due thereafter	750.5
Long Term Debt Maturities Repayments Of Principal, Total	$ 788.0

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Long Term Debt Maturities Repayments Of Principal

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 47

-Paragraph 10

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth rolling twelve months following the latest balance sheet presented.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth rolling twelve months following the latest balance sheet presented.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth rolling twelve months following the latest balance sheet presented.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third rolling twelve months following the latest balance sheet presented.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second rolling twelve months following the latest balance sheet presented.

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