Stock Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	0 Months Ended	3 Months Ended
	Mar. 31, 2014	Apr. 02, 2014 Subsequent Event	Mar. 31, 2014 RSUs	Mar. 31, 2014 Nonqualified Stock Options	Mar. 31, 2014 Employees Stock Compensation Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock split, conversion ratio	2	2
Shares granted					192,000
Number of shares granted			885,000	908,000
Fair value of shares granted			$ 17.7	$ 7.1
RSUs issued in connection with the election by employees to receive 50% of their 2014 target incentive compensation			100,000
Compensation percentage of target incentive compensation eligible to be elected and received by employees			50.00%
Restricted stock compensation expense			2.0
Total stock-based compensation, period of recognition			1 year
Unrecognized stock-based compensation expense			$ 27.6
Weighted-average period of recognition of unrecognized stock-based compensation expense (in years)			2 years 3 months 18 days