Segments - Schedule of Long-Lived Assets by Geographical Area (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Long-lived assets (excluding goodwill and investments):	$ 2,741,743	$ 3,020,209	$ 2,867,689
United States (country of domicile)
Segment Reporting Information [Line Items]
Long-lived assets (excluding goodwill and investments):	1,721,419	1,808,043
Brazil
Segment Reporting Information [Line Items]
Long-lived assets (excluding goodwill and investments):	541,891	688,809
United Kingdom
Segment Reporting Information [Line Items]
Long-lived assets (excluding goodwill and investments):	$ 274,530	$ 294,039