General and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Significant Accounting Policies [Abstract]

Schedule of Inventory, Current [Table Text Block]

Inventories consist of the following at December 31:

	2015		2014
Raw material	$	24,681	$	23,006
Work in process	4,282		3,546
Finished goods	14,669		10,381
Total	$	43,632	$	36,933

Property, Plant and Equipment [Table Text Block]

Property and equipment consist of the following at December 31: 

	2015			2014
Machinery and equipment	$	96,909		$	90,744
Land, building and building improvements	56,716			71,415
Molds	36,436			33,166
Computer equipment and software	23,346			23,228
Furniture and fixtures	3,638			3,571
Construction in progress	6,003			2,590
Total property and equipment, cost	223,048			224,714
Accumulated depreciation	(148,728		)	(138,623		)
Net property and equipment	$	74,320		$	86,091

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]

Intangible assets, carried at cost less accumulated amortization and amortized on a straight-lined basis, were as follows:

	Weighted Average	December 31, 2015
	Amortization Life in Years	Cost		Accumulated Amortization		Net
Patents	10	$	13,308	$	8,302	$	5,006
MCDA contract *	10	8,571		8,571		—
Customer contracts	9	5,319		4,133		1,186
Non-contractual customer relationships	15	7,080		118		6,962
Trademarks	4	425		425		—
Trade name	15	7,310		122		7,188
Developed technology	10	3,686		92		3,594
Total		$	45,699	$	21,763	$	23,936

	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

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)
	2015		2014		2013
Net income	$	44,985	$	26,335	$	40,418
Weighted average number of common shares outstanding (basic)	15,848		15,282		14,688
Dilutive securities	648		365		586
Weighted average common and common equivalent shares outstanding (diluted)	16,496		15,647		15,274
EPS - basic	$	2.84	$	1.72	$	2.75
EPS - diluted	$	2.73	$	1.68	$	2.65