Quarterly Results of Operations (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Quarterly Financial Information Disclosure [Abstract]

Summarized Quarterly Results of Operations

The following table summarizes the unaudited quarterly results of operations for the years ended December 31, 2014 and 2013.

	2014 Quarters								2013 Quarters
	First		Second		Third		Fourth		First		Second		Third		Fourth
	(In thousands, except per share amounts)
Net sales	$	543,996	$	546,693	$	533,179	$	523,899	$	494,448	$	518,445	$	490,617	$	520,620
Gross profit	244,420		241,132		234,646		229,117		211,997		222,849		211,509		227,009
Operating income	113,835		112,088		110,847		94,454		94,712		99,559		97,369		103,873
Net income	74,548		71,777		71,441		61,620		61,300		62,561		63,799		67,555
Basic EPS	$	0.92	$	0.89	$	0.89	$	0.78	$	0.74	$	0.76	$	0.78	$	0.83
Diluted EPS	$	0.91	$	0.88	$	0.88	$	0.77	$	0.74	$	0.76	$	0.78	$	0.82
Basic weighted average shares outstanding	80,527		80,106		79,558		78,669		82,197		81,829		81,259		80,782
Diluted weighted average shares outstanding	81,575		81,149		80,561		79,632		83,152		82,734		82,218		81,854