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Customer Leases, as Lessor - Future Minimum Lease Payments to be Received Under Non Cancelable Operating Customer Leases (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Leases [Abstract]  
2014 $ 149,158
2015 121,105
2016 93,411
2017 70,203
2018 54,212
Thereafter 56,981
Total $ 545,070