General and Summary of Significant Accounting Policies Intangible Assets #1 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Cost	$ 46,925	$ 45,699
Accumulated Amortization	24,542	21,763
Finite-Lived Intangible Assets, Net	$ 22,383	$ 23,936
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Life in Years	10 years	10 years
Cost	$ 14,423	$ 13,308
Accumulated Amortization	9,326	8,302
Finite-Lived Intangible Assets, Net	$ 5,097	$ 5,006
MCDA contract [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Life in Years	10 years	10 years
Cost	$ 8,571	$ 8,571
Accumulated Amortization	8,571	8,571
Finite-Lived Intangible Assets, Net	$ 0	$ 0
Customer Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Life in Years	9 years	9 years
Cost	$ 5,319	$ 5,319
Accumulated Amortization	4,512	4,133
Finite-Lived Intangible Assets, Net	$ 807	$ 1,186
Customer-Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Life in Years	15 years	15 years
Cost	$ 7,080	$ 7,080
Accumulated Amortization	590	118
Finite-Lived Intangible Assets, Net	$ 6,490	$ 6,962
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Life in Years	4 years	4 years
Cost	$ 425	$ 425
Accumulated Amortization	425	425
Finite-Lived Intangible Assets, Net	$ 0	$ 0
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Life in Years	15 years	15 years
Cost	$ 7,310	$ 7,310
Accumulated Amortization	609	122
Finite-Lived Intangible Assets, Net	$ 6,701	$ 7,188
Developed Technology Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Amortization Life in Years	10 years	10 years
Cost	$ 3,797	$ 3,686
Accumulated Amortization	509	92
Finite-Lived Intangible Assets, Net	$ 3,288	$ 3,594