Interest Payable Description

No definition available.

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- Definition

Notice Period For Note Redemption

+ References

No definition available.

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- Definition

Redemption Of Senior Notes

+ References

No definition available.

+ Details

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- Definition

Repurchase Price As Percentage Of Principal Amount Of Senior Notes

+ References

No definition available.

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- Details

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- Definition

Interest rate stated in the contractual debt agreement.

+ References

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- Definition

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

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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-Publisher FASB

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

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

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 21

-Paragraph 16, 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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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-Name FASB Staff Position (FSP)

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-Subparagraph b

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- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

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- Definition

The net cash inflow or cash outflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).

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-Topic 230

-SubTopic 10

-Section 45

-Paragraph 9

-Subparagraph c

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

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-Publisher FASB

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-Subparagraph (SX 210.7-03.16(a))

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Borrowings - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	1 Months Ended
	Mar. 31, 2013	Apr. 26, 2013 Subsequent Event [Member]	Mar. 31, 2013 Underwriting discount [Member]	Mar. 31, 2013 3.20% Senior Notes [Member]
Schedule Of Borrowings [Line Items]
Senior Notes				$ 300.0
Interest rate of debt				3.20%
Senior Notes discount			1.9	0.3
Proceeds related to the issuance of Senior Notes	297.8
Senior Notes interest payable description	Interest payable on May 1 and November 1 of each year
Principal amount due date	May 01, 2023
Notice to holders of the Senior Notes	Upon 30 days' notice to holders of the Senior Notes, the Company may redeem the Senior Notes for cash in whole
Redemptions of the Senior Notes	Redemptions of the Senior Notes on or after February 1, 2023
Repurchase price of principal amount of Senior Notes in Percentage	101.00%
Company full amount repaid on outstanding under the credit facility		$ 282.2