Basis of Presentation Basis of Presentation (Details) - Scenario, Forecast [Member] - Change in Assumptions for Pension Plans [Member] $ in Thousands	12 Months Ended
Dec. 31, 2016 USD ($)
Change in Accounting Estimate [Line Items]
Defined Benefit Plan Service and Interest Cost, Before Tax	$ 4,500
Defined Benefit Plan Service and Interest Cost, After Tax	$ 2,800

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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