QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of quarterly financial data

	First		Second		Third		Fourth
2012
Net sales	$	727,122	$	744,045	$	697,552	$	684,648
Gross profit	215,265		224,997		213,362		213,032
Income before income taxes	92,919		98,157		90,889		87,605
Net income	64,243		66,319		64,765		62,084
Basic earnings per share	$	0.77	$	0.80	$	0.78	$	0.75
Diluted earnings per share	$	0.76	$	0.79	$	0.77	$	0.74
2011
Net sales	$	599,179	$	699,293	$	701,624	$	694,513
Gross profit	161,438		195,504		185,452		194,343
Income before income taxes	60,537		81,494		75,873		83,427
Net income	46,910		57,013		55,530		57,733
Basic earnings per share	$	0.56	$	0.69	$	0.66	$	0.69
Diluted earnings per share	$	0.55	$	0.68	$	0.66	$	0.68