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Savings Plan - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Savings Plan, 401(k) Disclosure [Line Items] |  |  |
Employees eligible compensation deferral for 401(k) Plan | 60.00% |  |
401(k) Plan, employer matching percentage for the first 3% of participants' contribution | 100.00% |  |
401(k) Plan, employer matching percentage for the second 2% of participants' contribution | 50.00% |  |
Maximum potential employer match for 401(k) Plan | 4.00% |  |
Vested percentage for amounts contributed by the Company, after five years of employment | 100.00% |  |
Company's contribution to the 401(k) Plan | $ 1.3 | $ 1.3 | $ 1.1

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- Details
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