Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	7 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	May. 31, 2015	May. 31, 2014	May. 31, 2013
Income Tax [Line Items]
Effective tax rate	34.00%		36.00%	35.00%	37.00%
Provision for income taxes	$ 4,573	$ 13,622	$ 22,793	$ 16,236	$ 19,211
US Federal income tax rate	35.00%
Valuation allowance	$ 900
Net operating loss carryforwards	1,900
Undistributed earnings of foreign operations	15,300
Liabilities for uncertain tax positions	500
Liabilities for uncertain tax positions settled in next twelve months	100
Decrease in cash taxes due to increase in depreciation	1,700
Decrease in income tax expense	400
Indefinite Life [Member]
Income Tax [Line Items]
Net operating loss carryforwards	4,100
Foreign Subsidiaries [Member]
Income Tax [Line Items]
Valuation allowance	$ 900