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Discontinued Operations Discontinued Operations - Schedule of Discontinued Operations (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jul. 06, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Held for sale assets   $ 0 $ 29,814  
Held for sale liabilities   0 12,191  
Net income from discontinued operations   79,410 10,644 $ 6,390
Stock-based compensation expense   1,533 1,099 837
Capital expenditures   482 631 749
SISD [Member] | Discontinued Operations, Disposed of by Sale [Member]        
Accounts receivable, net     10,885  
Inventories, net     6,313  
Unbilled revenue     2,356  
Prepaid expenses and other current assets     2,955  
Property, plant, and equipment, net     1,944  
Goodwill     4,301  
Intangible assets, net     1,029  
Other assets     31  
Held for sale assets     29,814  
Accounts payable     1,891  
Accrued expenses     4,335  
Deferred revenue     5,965  
Held for sale liabilities     12,191  
Revenue   23,248 59,821 46,235
Cost of revenue   (11,291) (26,953) (21,191)
Research, development, and engineering expenses   (2,126) (4,089) (3,772)
Selling, general, and administrative expenses   (7,800) (12,968) (11,842)
Foreign currency loss   (177) (170) 0
Operating income from discontinued business   1,854 15,641 9,430
Gain on sale of discontinued business $ 125,357 125,357 0 0
Income from discontinued operations before income tax expense   127,211 15,641 9,430
Income tax expense on discontinued operations $ 47,175 47,801 4,997 3,040
Net income from discontinued operations   79,410 10,644 6,390
Stock-based compensation expense   1,533 1,099 837
Depreciation expense   401 777 703
Amortization expense   165 364 376
Capital expenditures   $ 482 $ 631 $ 749