Selected Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Selected Quarterly Financial Data (Unaudited)

Schedule of quarterly financial information

(in thousands, except

per share amounts)

	2012										2011
	Fourth			Third		Second			First		Fourth		Third			Second			First
	Quarter			Quarter		Quarter			Quarter		Quarter		Quarter			Quarter			Quarter
Net sales	$	144,686		$	172,113	$	181,703		$	158,734	$	130,732	$	162,366		$	177,812		$	132,536
Cost of sales	89,482			96,390		98,557			89,329		75,822		86,919			94,313			75,588
Gross profit	55,204			75,723		83,146			69,405		54,910		75,447			83,499			56,948
Research and development and other engineering	8,763			8,916		9,043			9,198		6,143		6,804			6,945			5,994
Selling	21,109			20,941		19,881			20,432		18,041		18,633			19,819			17,075
General and administrative	23,799			23,843		27,087			26,244		23,570		25,174			25,454			21,621
Impairment of goodwill	2,346			—		—			—		1,282		—			—			—
Loss (gain) on sale of assets	124			33		(13		)	23		190		(46		)	73			(25		)
Income (loss) from operations	(937		)	21,990		27,148			13,508		5,684		24,882			31,208			12,283
Income (loss) in equity method investment	—			—		—			—		—		4,471			(69		)	(14		)
Interest income, net	35			55		58			65		82		79			108			72
Income (loss) before income taxes	(902		)	22,045		27,206			13,573		5,766		29,432			31,247			12,341
Provision for (benefit from) income taxes	(6,785		)	9,069		11,347			6,372		818		10,052			11,754			5,263
Net income	$	5,883		$	12,976	$	15,859		$	7,201	$	4,948	$	19,380		$	19,493		$	7,078
Earnings per common share:
Basic	$	0.12		$	0.27	$	0.33		$	0.15	$	0.10	$	0.40		$	0.39		$	0.14
Diluted	0.12			0.27		0.33			0.15		0.10		0.40			0.39			0.14
Cash dividends declared per common share	$	0.25		$	0.125	$	0.125		$	0.125	$	0.125	$	0.125		$	0.125		$	0.125