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Newly Adopted Accounting Pronouncements (Details 2) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Jan. 01, 2018
Selling and Administrative Expenses | Scenario, Adjustment |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net benefit cost (credit) | $ 5,974 | $ 233 |
Other Expense, Net | Scenario, Adjustment |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net benefit cost (credit) | $ 5,974 | $ 233 |
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 |  |  | $ 1,262

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