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Newly Adopted Accounting Pronouncements (Details 2) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2017
Jan. 01, 2018
Selling and Administrative Expense | Scenario, Adjustment      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net benefit cost (credit) $ (60) $ 74  
Other Expense, Net | Scenario, Adjustment      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Net benefit cost (credit) $ (60) $ 74  
Accounting Standards Update 2016-16      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets     $ 94
ASU 2016-16, Increase (Decrease) in long-term deferred charge     1,281
Deferred Tax Asset, Intra-entity Transfer, Asset Other than Inventory     1,187
Accounting Standards Update 2018-02      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets     $ 1,263