Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Income Taxes [Line Items]
Statutory provision	35.00%			35.00%	35.00%	35.00%
Expense recognized for accrued interest and penalties	$ 240			$ 1	$ 280	$ 41
Accrued interest and penalties related to unrecognized tax benefits	1,810				1,810		$ 1,450
Income taxes paid against liabilities for unrecognized tax benefits	43,580				43,580		41,410
Unrecognized tax benefits	70,840				70,840		68,510
Unrecognized tax benefits, tax disputes					1,660
Service tax refunds claims	(4,150)				(4,150)
Income tax expense repatriation of foreign earnings			$ 270,600
Dividends per share			$ 15.00
Dividend distribution related taxes			$ 210,000
Repatriation of foreign earning			$ 1,030,000
Accrued taxes, likely amount	33,500				33,500
Local tax liability gross	400				400		400
Local tax liability net	300				$ 300		$ 300
Minimum Alternate Tax (MAT)
Income Taxes [Line Items]
Reversal of valuation allowance		$ 2,920
Minimum alternate tax credit expiration period					15 years		10 years
Valuation allowance, net tax charge	37,990				$ 37,990
Valuation allowance	2,470				2,470
Tax Year 1996-97
Income Taxes [Line Items]
Unrecognized tax benefits	53,970				53,970
Income tax liability recognized	$ 15,270				$ 15,270