Common Stock and Treasury Stock - Additional Information (Detail) - USD ($)		12 Months Ended			64 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Feb. 19, 2018	Feb. 28, 2014	Jul. 31, 2013	Sep. 13, 2012	Sep. 12, 2012
Maximum stock authorized to purchase under stock repurchase program						$ 200,000,000	$ 200,000,000			$ 262,100,000
Increase in maximum stock authorized to purchase under stock repurchase program							$ 100,000,000	$ 100,000,000
Repurchase of common stock, shares	1,346,427	1,653,573	3,020,926		41,782,966
Repurchase of common stock, value	$ 31,100,000	$ 37,387,000	$ 60,089,000		$ 493,300,000
Number shares issued pursuant to stock option exercises		1,204,559	792,841	1,144,273
Long-term incentive program performance share awards
Stock issued during the period performance share award			470,029	548,671
Restricted Share Awards (RSAs) [Member]
Stock issued during period, performance based restricted share awards		560,174	148,322	125,026
Performance-Based Restricted Share Awards [Member]
Stock issued during period, performance based restricted share awards				978,365
Stock Options [Member]
Number shares issued pursuant to stock option exercises		1,204,559	797,140	1,146,199
Maximum
Maximum stock authorized to purchase under stock repurchase program									$ 113,000,000
Stock authorized to purchase under stock repurchase program, shares									7,500,000
Remaining value of shares authorized for purchase under the stock repurchase program	$ 9,700,000	$ 40,800,000			$ 40,800,000