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Intangible Assets and Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill information
Impairment charge for tangible and intangible assets				$ 9,700
Terminal growth rate for key assumptions used in applying income approach		3.00%	3.00%	3.00%
Goodwill information for each reporting unit
Balance at the beginning of the period		$ 116,899	$ 116,899
Addition to goodwill		0	0
Goodwill impairment charge		0	0
Balance at the end of the period		116,899	116,899	$ 116,899
LDT
Goodwill information
Impairment charge				4,000
Remaining long-lived assets				12,900
LDT | Building Improvements
Goodwill information
Tangible asset impairment charges				3,500
LDT | Machinery
Goodwill information
Tangible asset impairment charges				500
LDT | Computer software
Goodwill information
Tangible asset impairment charges				200
MID
Goodwill information
Fair value of goodwill		$ 19,905	$ 19,905	$ 19,905
Percentage of fair value in excess of carrying amount		226.00%	511.00%	480.00%
Discount rates for key assumptions used in applying income approach		13.00%	15.00%	14.00%
Goodwill information for each reporting unit
Balance at the beginning of the period		$ 19,905	$ 19,905
Addition to goodwill		0	0
Goodwill impairment charge		0	0
Balance at the end of the period		19,905	19,905	$ 19,905
ESD Segment [Member]
Goodwill information
Discount rates for key assumptions used in applying income approach	36.00%
Goodwill information for each reporting unit
Goodwill impairment charge	$ 8,100
CRD
Goodwill information
Impairment charge				1,500
Remaining long-lived assets				99,400
Fair value of goodwill		$ 96,994	$ 96,994	$ 96,994
Percentage of fair value in excess of carrying amount		45.00%	53.00%	44.00%
Discount rates for key assumptions used in applying income approach		20.00%	22.00%	21.00%
Goodwill information for each reporting unit
Balance at the beginning of the period		$ 96,994	$ 96,994
Addition to goodwill		0	0
Goodwill impairment charge		0	0
Balance at the end of the period		96,994	96,994	$ 96,994
Other
Goodwill information for each reporting unit
Balance at the beginning of the period		0
Balance at the end of the period		$ 0	$ 0

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