Balance Sheet Details (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Prepaid expenses and other current assets
Prepaid expenses	$ 35,667	$ 32,655
Income tax receivable	7,194	14,890
Other current assets	12,788	12,707
Total	55,649	60,252
Accounts payable, accrued expenses and other
Accounts payable	14,078	15,779
Accrued expenses	45,676	43,137
Accrued interest payable	2,354	2,265
Accrued taxes payable	12,075	9,231
Other current liabilities	20,690	16,908
Total	$ 94,873	$ 87,320