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Composition of Certain Balance Sheet Accounts - Accrued Liabilities (Detail) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Accrued Liabilities, Current [Abstract]    
Employee compensation and benefits $ 13,696 $ 21,008
Airborne equipment and installation costs 27,476 22,442
Airborne partner related accrued liabilities 17,809 14,307
Accrued interest 19,569 40,436
Other 32,330 33,862
Total accrued liabilities $ 110,880 $ 132,055