Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income tax expense	$ 60,865	$ 33,050	$ 98,288	$ 66,600
Effective tax rate	37.90%	22.60%	32.80%	24.90%
Discrete tax charge from deemed income on foreign earnings	$ 22,700		$ 22,700		$ 1,900	$ 17,100	$ 3,700
Unrecognized tax benefits	65,600		65,600
Interest related to unrecognized tax benefits			3,000
Tax reserves on uncertain tax positions			300
Increase (decrease) in interest expense on prior year exposures of uncertain tax positions	100		$ 200
Tax reserves decreased primarily due to foreign currency translation	$ 100