Property and Equipment - Summary of Future Minimum Payments Required and Anticipated Lease Revenues (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Leases [Line Items]
Lease Commitments, 2013	$ 1,128
Lease Commitments, 2014	865
Lease Commitments, 2015	428
Lease Commitments, 2016	402
Lease Commitments, 2017	398
Lease Commitments, Thereafter	2,298
Lease Commitments, Total	5,519
Property Leased to Others, 2013	381
Property Leased to Others, 2014	341
Property Leased to Others, 2015	247
Property Leased to Others, 2016	227
Property Leased to Others, 2017
Property Leased to Others, Thereafter
Property Leased to Others, Total	$ 1,196

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Amount of minimum sublease rentals to be received by the seller-lessee for sale-leaseback transactions accounted for using the deposit method or as a financing.

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-Publisher FASB

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Amount of minimum sublease rentals to be received by the seller-lessee after the fifth fiscal year following the latest fiscal year for sale-leaseback transactions accounted for using the deposit method or as a financing.

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Amount of minimum sublease rentals to be received by the seller-lessee in the fifth fiscal year following the latest fiscal year for sale-leaseback transactions accounted for using the deposit method or as a financing.

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Amount of minimum sublease rentals to be received by the seller-lessee in the fourth fiscal year following the latest fiscal year for sale-leaseback transactions accounted for using the deposit method or as a financing.

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Amount of minimum sublease rentals to be received by the seller-lessee in the next fiscal year following the latest fiscal year for sale-leaseback transactions accounted for using the deposit method or as a financing.

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Amount of minimum sublease rentals to be received by the seller-lessee in the third fiscal year following the latest fiscal year for sale-leaseback transactions accounted for using the deposit method or as a financing.

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Amount of minimum sublease rentals to be received by the seller-lessee in the second fiscal year following the latest fiscal year for sale-leaseback transactions accounted for using the deposit method or as a financing.

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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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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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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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