Unaudited Quarterly Results of Operations (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 520,620	$ 490,617	$ 518,445	$ 494,448	$ 490,838	$ 479,859	$ 494,144	$ 489,417	$ 2,024,130		$ 1,954,258		$ 1,838,451
Gross profit	227,009	211,509	222,849	211,997	202,858	194,840	203,113	202,889	873,364		803,700		738,673
Operating income (loss)	103,873	97,369	99,559	94,712	(125,589)	80,588	88,650	84,569	395,513	[1]	128,218	[1]	304,656	[1]
Net income (loss)	$ 67,555	$ 63,799	$ 62,561	$ 61,300	$ (119,019)	$ 50,127	$ 54,351	$ 52,171	$ 255,215		$ 37,630		$ 193,857
Basic EPS	$ 0.83	$ 0.78	$ 0.76	$ 0.74	$ (1.45)	$ 0.60	$ 0.65	$ 0.63	$ 3.11		$ 0.45		$ 2.34
Diluted EPS	$ 0.82	$ 0.78	$ 0.76	$ 0.74	$ (1.45)	$ 0.60	$ 0.65	$ 0.62	$ 3.09		$ 0.45		$ 2.32
Basic weighted average shares outstanding	80,782	81,259	81,829	82,197	82,296	82,482	83,180	82,804	81,517		82,689		82,145
Diluted weighted average shares outstanding	81,854	82,218	82,734	83,152	82,296	83,370	84,090	83,902	82,489		83,641		83,543

[1] (1)Segment operating income excludes net unallocated corporate operating expenses.