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Future Minimum Rental Payments for Noncancelable Operating Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Schedule of Operating Leases [Line Items]  
2013 $ 439
2014 449
2015 460
2016 471
2017 482
Thereafter 34,621
Operating Leases, Future Minimum Payments Due, Total $ 36,922