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Lease Agreements - Future Contractual Payments Under Noncancelable Leases (Detail)
$ in Thousands
Dec. 31, 2016
USD ($)
Leases [Abstract]  
2017 $ 154,489
2018 138,724
2019 117,135
2020 97,155
2021 78,248
Thereafter 245,218
Total future contractual payments $ 830,969