Aggregate Minimum Operating Lease Payments under Newly Obtained Agreements (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Operating Leases
Remainder of 2013	$ 3,726
2014	4,243
2015	2,123
2016	1,967
2017	342
Total minimum lease payments	$ 12,401

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the fifth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the forth fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the third fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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Amount of required minimum rental payments maturing in the second fiscal year following the latest fiscal year for operating leases having an initial or remaining non-cancelable letter-terms in excess of one year.

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