| Restructuring Activities (Details Textuals) - USD ($) $ in Thousands | 3 Months Ended | |
|---|---|---|
| Mar. 31, 2017 | Mar. 31, 2016 | |
| Restructuring charges | $ 0 | $ 2,106 | 
| Operating Leases, Rent Expense, Sublease Rentals | 500 | 100 | 
| Facility Closing [Member] | ||
| Restructuring charges | $ 0 | $ 1,976 | 
| X | ||||||||||
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- Definition The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating leases. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Details 
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