Common Stock and Share-Based Compensation - Summary of Restricted Stock Unit Activity (Detail) (Restricted Stock Units (RSUs), USD $)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at January 1, 2013	525,099	[1]
Stock units issued	222,651	[1]
Shares issued upon vesting of stock units	(213,906)	[1]
Stock units canceled or forfeited	(283,024)	[1],[2]
Adjustment to stock units outstanding at the time of WhiteWave spin-off	525,470	[1],[3]
Outstanding at December 31, 2013	776,290	[1]
Weighted average grant date fair value	$ 13.95	[1]
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at January 1, 2013	492,629	[1]
Stock units issued	188,926	[1]
Shares issued upon vesting of stock units	(194,746)	[1]
Stock units canceled or forfeited	(277,663)	[1],[2]
Adjustment to stock units outstanding at the time of WhiteWave spin-off	470,871	[1],[3]
Outstanding at December 31, 2013	680,017	[1]
Weighted average grant date fair value	$ 14.15	[1]
Director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding at January 1, 2013	32,470	[1]
Stock units issued	33,725	[1]
Shares issued upon vesting of stock units	(19,160)	[1]
Stock units canceled or forfeited	(5,361)	[1],[2]
Adjustment to stock units outstanding at the time of WhiteWave spin-off	54,599	[1],[3]
Outstanding at December 31, 2013	96,273	[1]
Weighted average grant date fair value	$ 12.46	[1]

[1] On August 26, 2013 we effected a 1-for-2 reverse stock split of our issued common stock. The number and weighted average grant date fair value of stock units outstanding as of January 1, 2013 and any stock unit activity during 2013 prior to the date of the reverse stock split have been adjusted retroactively to reflect the reverse stock split.

[2] Pursuant to the terms of our stock unit plans, employees have the option of forfeiting stock units to cover their minimum statutory tax withholding when shares are issued. Effective May 15, 2013, any stock units surrendered or cancelled in satisfaction of participants' tax withholding obligations will no longer become available for future grants under the plans.

[3] The number and exercise prices of certain stock units outstanding at the time of the WhiteWave spin-off were proportionately adjusted to maintain the aggregate intrinsic value of the stock units before and after the WhiteWave spin-off.