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Discontinued Operations Discontinued Operations (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Discontinued operations, cash received                 $ 12,500    
Disposal Group, Including Discontinued Operation, Revenue                 0 $ 2,462 $ 18,534
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax                 0 346 2,841
Discontinued Operation, Tax Effect of Discontinued Operation                 0 133 980
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax                 0 213 1,861
Pre-tax gain on sale of ASMP                 0 (1,877) 0
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation                 0 398 0
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax                 0 1,479 0
Income and gain from discontinued operations, net of tax $ 0 $ 0 $ 0 $ 0 $ 325 $ 0 $ 0 $ 1,367 $ 0 $ 1,692 $ 1,861
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic and Diluted Share         $ 0.03 $ 0.00 $ 0.00 $ 0.16      
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share $ 0.00 $ 0.00 $ 0.00 $ 0.00         $ 0.00 $ 0.20 $ 0.22
ASMP [Member]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax                 $ 0 $ 346 $ 2,801
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share                 $ 0.00 $ 0.20 $ 0.21
Other discontinued operations [Member]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax                 $ 0 $ 0 $ 40
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share                 $ 0.00 $ 0.00 $ 0.01