General and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Summary of Significant Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following at December 31:

	2014		2013
Raw material	$	23,006	$	21,867
Work in process	3,546		2,749
Finished goods	10,381		9,835
Total	$	36,933	$	34,451

Property, Plant and Equipment [Table Text Block]

Property and equipment consist of the following at December 31: 

	2014			2013
Machinery and equipment	$	90,744		$	84,317
Land, building and building improvements	71,415			64,238
Molds	33,166			30,813
Computer equipment and software	23,228			21,625
Furniture and fixtures	3,571			3,552
Construction in progress	2,590			8,456
Total property and equipment, cost	224,714			213,001
Accumulated depreciation	(138,623		)	(125,140		)
Net property and equipment	$	86,091		$	87,861

All property and equipment are stated at cost.  We use the straight-line method for depreciating property and equipment over their estimated useful lives.  Estimated useful lives are:

Buildings	15 - 30 years
Building improvements	15 years
Machinery and equipment	2 - 10 years
Furniture, fixtures and molds	2 - 5 years
Computer equipment and software	3 - 5 years

Schedule of Intangible Assets and Goodwill [Table Text Block]

	Weighted Average	December 31, 2014
	Amortization Life in Years	Cost		Accumulated Amortization		Net
Patents	9	$	12,357	$	7,315	$	5,042
MCDA contract *	10	8,571		8,285		286
Customer contracts	9	5,319		3,584		1,735
Trademarks	4	425		425		—
Total		$	26,672	$	19,609	$	7,063

	Weighted Average	December 31, 2013
	Amortization Life in Years	Cost		Accumulated Amortization		Net
Patents	9	$	11,367	$	6,389	$	4,978
MCDA contract *	10	8,571		7,428		1,143
Customer contracts	9	5,319		2,950		2,369
Trademarks	4	425		425		—
Total		$	25,682	$	17,192	$	8,490

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following table presents the calculation of net earnings per common share (“EPS”) — basic and diluted. 

	Year ended December 31, (in thousands, except per share data)
	2014		2013		2012
Net income	$	26,335	$	40,418	$	41,281
Weighted average number of common shares outstanding (basic)	15,282		14,688		14,223
Dilutive securities	365		586		502
Weighted average common and common equivalent shares outstanding (diluted)	15,647		15,274		14,725
EPS - basic	$	1.72	$	2.75	$	2.90
EPS - diluted	$	1.68	$	2.65	$	2.80