Annual report pursuant to Section 13 and 15(d)

Income Taxes - Summary of Components of Income (Loss) Before Income Taxes (Detail)

v3.8.0.1
Income Taxes - Summary of Components of Income (Loss) Before Income Taxes (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
United States $ (89,233) $ (131,106) $ (77,368)
Foreign (20,428) (25,538) 5,397
Income (loss) before income taxes $ (109,661) $ (156,644) $ (71,971)