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Benefit Plans Amortization (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($)
Pension Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Amortization of prior service cost | $ 3,504
Amortization of loss | 79
Total | 3,583
Other Postretirement Benefit Plan [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Amortization of prior service cost | 197
Amortization of loss | 316
Total | $ 513

X
- Definition Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation). + References No definition available. + Details
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