Stock-Based Compensation - Additional Information (Detail) (USD $)	6 Months Ended		3 Months Ended	0 Months Ended	6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2011 RSUs with Service and Performance Conditions [Member] Six Members of Leadership Team [Member] Person	Apr. 01, 2014 RSUs with Service and Performance Conditions [Member] Five Members of Leadership Team [Member] Person	Jun. 30, 2014 Restricted Stock Units [Member]	Jun. 30, 2013 Restricted Stock Units [Member]	Dec. 31, 2013 Restricted Stock Units [Member] Six Members of Leadership Team [Member]	Dec. 31, 2012 Restricted Stock Units [Member] Six Members of Leadership Team [Member]	Dec. 31, 2011 Restricted Stock Units [Member] Six Members of Leadership Team [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company granted RSU's			294,000	280,591	2,304,000
Number of team members to whom restricted stock units with service and performance conditions were granted in period			6	5
Share based compensation other than options, vested in period by eligible recipients							81,323	69,848	87,268
Aggregate intrinsic value of stock options exercised	$ 3,700,000	$ 4,400,000
Remaining unrecognized compensation expense related to non-vested stock options	0
Weighted average grant date fair value of RSUs granted					$ 17.21	$ 12.02
Aggregated intrinsic value of the RSUs vested					39,200,000	23,100,000
Intrinsic value of the non-vested net of forfeitures					106,400,000
Compensation expense related to non-vested RSUs to be recognized as expense					$ 71,500,000
Weighted average period for compensation expense related to non-vested RSUs to be recognized as expense	2 years 7 months 6 days