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Estimated Future Minimum Rental Payments Under Operating Leases (Detail)
$ in Thousands
Dec. 31, 2014
USD ($)
Leases Future Minimum Payments [Line Items]  
2015 $ 75,629
2016 66,315
2017 61,138
2018 48,292
2019 24,211
2020 and thereafter 24,421
Total $ 300,006