Annual report pursuant to Section 13 and 15(d)

Other Long-Term Liabilities - Summary of Other Long-Term Liabilites (Detail)

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Other Long-Term Liabilities - Summary of Other Long-Term Liabilites (Detail) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other Long Term Liabilities Disclosure [Abstract]    
Other long term liabilities $ 19,059 $ 13,862
Income taxes payable 99,200 4,993
Total other long-term liabilities $ 118,259 $ 18,855