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Debt - Additional Information (Detail) (Revolving Credit Facility [Member], USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended
	May 13, 2013	Jun. 30, 2013
Line of Credit Facility [Line Items]
Senior Secured Revolving Credit Facility Maximum Borrowing Amount	$ 500
Senior Secured Revolving Credit Facility Maturity Year and Month		2016-05
Line of credit facility accordion amount	75
Line of credit facility additional accordion amount	$ 100
Senior Secured Revolving Credit Facility, Basis Spread on Variable Rate		1.00%
Pays an unused line fee per annum		0.005%
Decreases unused line fee		0.00375%
London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Interest rate prime plus		3.00%
Senior Secured Revolving Credit Facility, Description of Variable Rate Basis		the Company elects between one month and six months, with a LIBOR floor of 1.00%, plus an applicable margin (which was 3.00% as of June 30, 2013) based on its leverage ratio
Prime Rate [Member]
Line of Credit Facility [Line Items]
Interest rate prime plus		2.00%
Senior Secured Revolving Credit Facility, Description of Variable Rate Basis		the Company may pay interest at a rate based on the prime rate plus an applicable margin (which was 2.00% as of June 30, 2013)

X

- Definition

Debt Instrument Maturity Month And Year

+ References

No definition available.

+ Details

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X

- Definition

Line Of Credit Facility Accordion Feature

+ References

No definition available.

+ Details

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Balance Type:	credit
Period Type:	duration

X

- Definition

Line of Credit Facility Accordion Feature Additional Borrowing Capacity

+ References

No definition available.

+ Details

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X

- Definition

Line of credit facility basis spread on variable rate.

+ References

No definition available.

+ Details

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X

- Definition

Line of credit facility decrease commitment fee percentage.

+ References

No definition available.

+ Details

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X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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- Details

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X

- Definition

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.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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X

- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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