Stockholders' Equity - Summary of Estimated Earned Payout (Detail)	12 Months Ended
	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated Payout Combined	200.00%
2017 Three-year PSU Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target level for performance goals measure, three year compound annual growth rate of net trade sales	100.00%
Estimated Payout on Adjusted EBITDA	100.00%
Estimated Payout on TSR	100.00%
Estimated Payout Combined	100.00%
2016 Three-year PSU Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated Payout on Adjusted EBITDA	59.00%
Estimated Payout on TSR	0.00%
Estimated Payout Combined	30.00%
2015 Three-year PSU Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated Payout on Adjusted EBITDA	73.00%
Estimated Payout on TSR	73.00%
Estimated Payout Combined	73.00%