Income Taxes - Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	3 Months Ended										12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Federal
Current											$ 14,108	$ (6,889)	$ 7,895
Deferred											19,034	18,024	7,021
Total											33,142	11,135	14,916
State
Current											12,565	379	1,542
Deferred											(2,502)	(4,096)	(2,397)
Total											10,063	(3,717)	(855)
Foreign
Current											11,671	15,117	13,335
Deferred											1,170	5,402	3,813
Total											12,841	20,519	17,148
Income tax provision	$ 43,171	$ (6,426)	$ (17,669)		$ 36,970		$ 18,856	$ 3,786	$ 5,825	$ (530)	$ 56,046	$ 27,937	$ 31,209

[1] As previously discussed in Note 1, Nature of Business and Summary of Significant Accounting Policies, the Company adopted ASU 2016-09 during the year ended December 31, 2016. The Company elected to early adopt ASU 2016-09 in the third quarter of 2016, which requires it to reflect any adjustments as of January 1, 2016, the beginning of the annual period that includes the interim period of adoption. The impact of the adoption to the Company's previously reported quarterly results for the quarters ended March 31 and June 30, 2016 are reflected in the table above.