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Leases and Restricted Cash - Operating Leases - Additional Information (Detail) - Property Subject to Operating Lease [Member] $ in Millions | Dec. 31, 2015 USD ($)
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Operating Leased Assets [Line Items] |
Minimum scheduled future revenues, operating lease, 2016 | $ 349.5
Minimum scheduled future revenues, operating lease, 2017 | 351.9
Minimum scheduled future revenues, operating lease, 2018 | 397.2
Minimum scheduled future revenues, operating lease, 2019 | 428.2
Minimum scheduled future revenues, operating lease, 2020 | $ 419.1

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