Debt - Future Minimum Lease Payments Under Capital Lease (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Schedule Of Capital Leases Future Minimum Payments Due [Line Items]
2013	$ 703
2014	117
2015
2016
2017
Thereafter
Future minimum lease payments under capital leases	820
Amount representing interest	(63)
Future minimum lease payments under capital leases, excluding interest	$ 757

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Amount of minimum lease payments for capital leases.

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Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the fifth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the forth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the third fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the second fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing after the fifth fiscal year following the latest fiscal year for capital leases.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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