Quarterly Results Of Operations (Tables)

12 Months Ended

Dec. 31, 2011

Dec. 31, 2010

Quarterly Results Of Operations [Abstract]

Schedule Of Quarterly Financial Information

	2011
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Net Sales
Net sales of tangible products	$	226,120		$	232,762		$	241,686		$	235,714
Revenue from services and software		11,181			12,779			11,652			11,594
Total net sales		237,301			245,541			253,338			247,308
Cost of Sales
Cost of sales of tangible products		110,781			117,732			122,529			118,792
Cost of sales services and software		6,522			6,111			7,256			6,996
Cost of sales		117,303			123,843			129,785			125,788
Gross Profit		119,998			121,698			123,553			121,520
Operating expenses:
Selling and marketing		28,528			30,950			31,942			36,377
Research and development		21,681			22,487			22,584			23,174
General and administrative		22,706			20,688			19,166			19,089
Amortization of intangible assets		835			836			843			806
Litigation settlement		0			0			0			0
Exit and restructuring		1,886			66			138			(49)
Total operating expenses		75,636			75,027			74,673			79,397
Operating income		44,362			46,671			48,880			42,123
Other income (loss)
Investment income (loss)		560			656			134			594
Foreign exchange gain (loss)		(294	)		(833	)		(173	)		(706)
Other, net		(254	)		(243	)		(859	)		(899)
Total other income (loss)		12			(420	)		(898	)		(1,011)
Income from continuing operations before income taxes		44,374			46,251			47,982			41,112
Income taxes		14,246			13,082			13,795			8,253
Income from continuing operations		30,128			33,169			34,187			32,859
Income (loss) from discontinued operations, net of tax		31,506			(205	)		10,814			2,185
Net income	$	61,634		$	32,964		$	45,001		$	35,044
Basic earnings per share:
Income from continuing operations	$	0.54		$	0.60		$	0.64		$	0.63
Income from discontinued operations		0.57			0.00			0.20			0.04
Net Income	$	1.11		$	0.60		$	0.84		$	0.67
Diluted earnings per share:
Income from continuing operations	$	0.54		$	0.60		$	0.64		$	0.63
Income from discontinued operations		0.56			0.00			0.20			0.04
Net Income	$	1.10		$	0.60		$	0.84		$	0.67
Basic weighted average shares outstanding		55,353			54,546			53,339			52,108
Diluted weighted average and equivalent shares outstanding		55,774			54,958			53,628			52,354

	2010
	First Quarter			Second Quarter			Third Quarter			Fourth Quarter
Net Sales
Net sales of tangible products	$	201,463		$	207,748		$	218,271		$	222,048
Revenue from services and software		10,512			10,810			11,536			11,971
Total net sales		211,975			218,558			229,807			234,019
Cost of Sales
Cost of sales of tangible products		109,075			114,081			114,924			112,550
Cost of sales services and software		5,137			5,068			5,636			7,113
Cost of sales		114,212			119,149			120,560			119,663
Gross Profit		97,763			99,409			109,247			114,356
Operating expenses:
Selling and marketing		24,673			27,682			28,068			31,942
Research and development		18,324			20,653			21,862			21,736
General and administrative		19,318			17,955			18,147			17,809
Amortization of intangible assets		741			740			839			891
Litigation settlement		0			0			0			(1,082)
Exit and restructuring costs		1,766			466			0			30
Total operating expenses		64,822			67,496			68,916			71,326
Operating income		32,941			31,913			40,331			43,030
Other income (loss)
Investment income (loss)		842			634			635			567
Foreign exchange gain (loss)		168			424			(148	)		(613)
Other, net		(270	)		(455	)		(160	)		(232)
Total other income (loss)		740			603			327			(278)
Income from continuing operations before income taxes		33,681			32,516			40,658			42,752
Income taxes		8,134			10,331			13,411			13,117
Income from continuing operations	$	25,547		$	22,185		$	27,247		$	29,635
Income (loss) from discontinued operations, net of tax		(814	)		492			(1,096	)		(1,418)
Net income	$	24,733		$	22,677		$	26,151		$	28,217
Basic earnings per share:
Income from continuing operations	$	0.44		$	0.38		$	0.48		$	0.53
Income (loss) from discontinued operations		(0.01	)		0.01			(0.02	)		(0.03)
Net Income	$	0.43		$	0.39		$	0.46		$	0.50
Diluted earnings per share:
Income from continuing operations	$	0.44		$	0.38		$	0.48		$	0.53
Income (loss) from discontinued operations		(0.02	)		0.01			(0.02	)		(0.03)
Net Income	$	0.42		$	0.39		$	0.46		$	0.50
Basic weighted average shares outstanding		58,016			57,489			56,739			56,332
Diluted weighted average and equivalent shares outstanding		58,265			57,737			56,998			56,692