Accrued Expenses - Constituents of Accrued Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Constituents of accrued expenses
Company bonuses	$ 11,462	$ 4,895
Salaries, commissions, and payroll taxes	7,193	4,859
Vacation	4,860	4,482
Warranty obligations	4,335	4,174
Foreign retirement obligations	3,388	3,249
Other	11,301	11,613
Accrued expenses	$ 42,539	$ 33,272