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Employee Benefit Plan - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] | |||
| Plan contributions cost | $ 2.8 | $ 2.4 | $ 2.4 |
| Employee vested percentage | 100.00% | ||
| Participation waiting period | 30 days | ||
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First 4 percent of employees pre-tax contributions [Member]
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| Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] | |||
| Employee vested percentage | 100.00% | ||
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Next 2 percent of employees pre-tax contributions [Member]
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| Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items] | |||
| Employee vested percentage | 50.00% | ||
| X | ||||||||||
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- Details
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- Definition
Number of days a participant must wait from the date of hire before being eligible for participation in the Employee Benefit Plan. No definition available.
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- Definition
The amount of the cost recognized during the period for defined contribution plans. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Percentage of employer's matching contributions to a defined contribution plan that vests in a given year. No definition available.
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