Unaudited Quarterly Data (Tables)

12 Months Ended

Dec. 31, 2011

Unaudited Quarterly Data (Tables) [Abstract]

Quarterly Financial Data

		1st Quarter		2nd Quarter		3rd Quarter		4th Quarter
		(In thousands, except per share data)
Year Ended December 31, 2011
	Revenues …………………………………..	$	742,178	$	698,253	$	704,271	$	737,482
	Gross profit …………………………………		523,148		506,355		505,724		517,289
	Operating profit …………………………….		80,419		73,152		57,796		81,790
	Net earnings ………………………………..		44,230		39,888		31,224		49,295
	Basic earnings per common share ………….	$	0.70	$	0.64	$	0.52	$	0.84
	Diluted earnings per common share ………..	$	0.69	$	0.63	$	0.52	$	0.83
	Cash dividends paid per common share ………..	$	0.06	$	0.06	$	0.16	$	0.16

Year Ended December 31, 2010
	Revenues …………………………………..	$	718,419	$	671,543	$	664,580	$	677,090
	Gross profit …………………………………		513,000		497,665		490,013		494,994
	Operating profit …………………………….		88,703		82,831		69,393		62,842
	Net earnings ………………………………..		51,461		47,830		40,497		31,854
	Basic earnings per common share ………….	$	0.78	$	0.73	$	0.62	$	0.50
	Diluted earnings per common share ………..	$	0.77	$	0.72	$	0.62	$	0.49
	Cash dividends paid per common share …………	$	—	$	—	$	0.06	$	0.06

		1st Quarter		2nd Quarter		3rd Quarter		4th Quarter
		(In thousands, except per share data)
Year Ended December 31, 2009
	Revenues …………………………………..	$	728,183	$	679,609	$	671,251	$	672,913
	Gross profit …………………………………		515,212		494,422		487,239		491,125
	Operating profit …………………………….		82,092		75,283		64,367		74,582
	Net earnings ………………………………..		45,376		41,945		36,840		43,694
	Basic earnings per common share ………….	$	0.69	$	0.64	$	0.56	$	0.66
	Diluted earnings per common share ………..	$	0.68	$	0.63	$	0.55	$	0.66