Operations and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Operations and Summary of Significant Accounting Policies

Schedule of estimated useful lives over which depreciation of software, machinery and equipment is provided for using accelerated methods

Software	3 to 5 years
Machinery and equipment	3 to 10 years

Reconciliation of basic earnings (loss) per share ("EPS") to diluted EPS

(in thousands, except)

per-share amounts)

	Year Ended December 31,
	2011		2010			2009
Earnings from continuing operations, net of tax	$	50,900	$	44,798		$	14,121
Loss from discontinued operations, net of tax	—		(16,212		)	(1,904		)
Net income available to common stockholders	$	50,900	$	28,586		$	12,217
Basic weighted average shares outstanding	48,974		49,498			49,135
Dilutive effect of potential common stock equivalents — stock options	49		114			121
Diluted weighted average shares outstanding	49,023		49,612			49,256
Net earnings (loss) per share — basic:
Continuing operations	$	1.04	$	0.91		$	0.29
Discontinued operations	—		(0.33		)	(0.04		)
Net income	1.04		0.58			0.25
Net earnings (loss) per share — diluted:
Continuing operations	$	1.04	$	0.90		$	0.29
Discontinued operations	—		(0.33		)	(0.04		)
Net income	1.04		0.58			0.25
Potentially dilutive securities excluded from earnings per diluted share because their effect is anti-dilutive	1,363		1,018			1,037

Stock-based compensation activity, including both continuing and discontinued operations of the entity

(in thousands)

	Years Ended December 31,
	2011			2010			2009
Stock-based compensation expense recognized in operating expenses	$	6,133		$	3,338		$	1,746
Tax benefit of stock-based compensation expense in provision for income taxes	2,261			1,212			544
Stock-based compensation expense, net of tax	$	3,872		$	2,126		$	1,202
Fair value of shares vested	$	6,194		$	3,577		$	1,690
Proceeds to the Company from the exercise of stock-based compensation	$	214		$	17,948		$	7,627
Tax benefit from exercise of stock-based compensation, including (shortfall) tax benefits	$	(1,554	)	$	(2,430	)	$	(445	)

(in thousands)

	At December 31,
	2011		2010		2009
Stock-based compensation cost capitalized in inventory	$	345	$	284	$	45

Schedule of changes in the carrying amount of goodwill, by segment

(in thousands)

									Venting
									Products
	North						Asia		Discontinued
	America			Europe			Pacific		Operations			Total
Balance as of January 1, 2010:
Goodwill	$	52,241		$	36,864		$	1,716	$	4,435		$	95,256
Accumulated impairment losses	(10,666		)	(2,964		)	—		—			(13,630		)
	41,575			33,900			1,716		4,435			81,626
Goodwill acquired	—			1,100			—		—			1,100
Foreign exchange	186			(2,341		)	225		—			(1,930		)
Impairment				(6,292		)	—		(4,435		)	(10,727		)
Balance as of December 31, 2010:
Goodwill	52,427			35,623			1,941		4,435			94,426
Accumulated impairment losses	(10,666		)	(9,256		)	—		(4,435		)	(24,357		)
	41,761			26,367			1,941		—			70,069
Goodwill acquired	32,230			—			—		—			32,230
Foreign exchange	(90		)	(750		)	7		—			(833		)
Impairment	—			(1,282		)	—		—			(1,282		)
Reclassifications	—			(335		)	—		—			(335		)
Balance as of December 31, 2011:
Goodwill	84,567			34,538			1,948		4,435			125,488
Accumulated impairment losses	(10,666		)	(10,538		)	—		(4,435		)	(25,639		)
	$	73,901		$	24,000		$	1,948	$	—		$	99,849

Schedule of changes in the carrying amounts of intangible assets subject to amortization, including both continuing and discontinued operations

(in thousands)

	Gross						Net
	Carrying			Accumulated			Carrying
Patents	Amount			Amortization			Amount
Balance at January 1, 2010	$	6,939		$	(3,758	)	$	3,181
Amortization	—			(626		)	(626		)
Foreign exchange	(18		)	—			(18		)
Balance at December 31, 2010	6,921			(4,384		)	2,537
Amortization	—			(620		)	(620		)
Foreign exchange	(3		)	—			(3		)
Removal of fully amortized asset	(237		)	237			—
Balance at December 31, 2011	$	6,681		$	(4,767	)	$	1,914

	Gross						Net
	Carrying			Accumulated			Carrying
Unpatented Technology	Amount			Amortization			Amount
Balance at January 1, 2010	$	2,962		$	(481	)	$	2,481
Amortization	—			(398		)	(398		)
Foreign exchange	(114		)	—			(114		)
Balance at December 31, 2010	2,848			(879		)	1,969
Amortization	—			(516		)	(516		)
Foreign exchange	(66		)	—			(66		)
Reclassifications	1,347			—			1,347
Balance at December 31, 2011	$	4,129		$	(1,395	)	$	2,734

	Gross						Net
Non-Compete Agreements,	Carrying			Accumulated			Carrying
Tradmarks and Other	Amount			Amortization			Amount
Balance at January 1, 2010	$	8,095		$	(3,223	)	$	4,872
Acquisition	1,633			—			1,633
Amortization	—			(1,358		)	(1,358		)
Impairment	—			(166		)	(166		)
Foreign exchange	(164		)	—			(164		)
Removal of fully amortized asset	(436		)	436			—
Balance at December 31, 2010	9,128			(4,311		)	4,817
Acquisition	9,026			—			9,026
Amortization	—			(1,297		)	(1,297		)
Foreign exchange	(19		)	—			(19		)
Reclassifications	(1,612		)	—			(1,612		)
Removal of fully amortized asset	(247		)	247			—
Balance at December 31, 2011	$	16,276		$	(5,361	)	$	10,915

	Gross						Net
	Carrying			Accumulated			Carrying
Customer Relationships	Amount			Amortization			Amount
Balance at January 1, 2010	$	23,282		$	(4,964	)	$	18,318
Amortization	—			(2,190		)	(2,190		)
Impairment	—			(1,478		)	(1,478		)
Foreign exchange	(507		)	—			(507		)
Removal of fully amortized asset	(3,018		)	3,018			—
Balance at December 31, 2010	19,757			(5,614		)	14,143
Amortization	—			(1,893		)	(1,893		)
Foreign exchange	(112		)	—			(112		)
Reclassifications	155			—			155
Removal of fully amortized asset	(860		)	860			—
Balance at December 31, 2011	$	18,940		$	(6,647	)	$	12,293

Schedule of changes in the carrying amounts of finite-lived intangible assets, net, by segment

	At December 31, 2010
	Gross					Net
	Carrying		Accumulated			Carrying
Total Intangible Assets	Amount		Amortization			Amount
North America	$	24,022	$	(10,792	)	$	13,230
Europe	14,632		(4,396		)	10,236
Total	$	38,654	$	(15,188	)	$	23,466

	At December 31, 2011
	Gross					Net
	Carrying		Accumulated			Carrying
Total Intangible Assets	Amount		Amortization			Amount
North America	$	32,912	$	(13,288	)	$	19,624
Europe	13,114		(4,882		)	8,232
Total	$	46,026	$	(18,170	)	$	27,856

Estimated future amortization of intangible assets

(in thousands)

2012	$	5,102
2013	4,535
2014	4,322
2015	3,560
2016	3,425
Thereafter	6,912
	$	27,856