Stock Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	6 Months Ended
	Apr. 01, 2014	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock split, conversion ratio	2	2
Unrecognized stock-based compensation expense		$ 25.6
Weighted-average period of recognition of unrecognized stock-based compensation expense (in years)		2 years 2 months 12 days
Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted		422,000
Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued		22,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted		1,049,000
Fair value of shares granted		20.7
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
Total stock-based compensation, period of recognition		1 year
Nonqualified Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of shares granted		$ 8.2
Number of shares granted		1,070,000