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Accrued Liabilities - Summary of Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accrued Liabilities Current [Abstract]
Accrued wages, bonuses and commissions	$ 25,471	$ 17,875
Other accrued liabilities	7,368	8,143
Accrued liabilities, Total	$ 32,839	$ 26,018

Carrying value as of the balance sheet date of obligations incurred through that date and payable arising from transactions not otherwise specified in the taxonomy. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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