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Retirement Plans, Estimated Amounts That Will be Amortized from Accumulated Other Comprehensive Income Into Net Periodic Benefit Cost (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($)
Pension Benefits [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Actuarial gain (loss) | $ 4,924
Prior service cost (credit) | 0
Estimated amounts to be amortized | 4,924
SERP [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Actuarial gain (loss) | 26
Prior service cost (credit) | 0
Estimated amounts to be amortized | 26
Other Postretirement Benefits [Member] |
Defined Benefit Plan Disclosure [Line Items] |
Actuarial gain (loss) | (745)
Prior service cost (credit) | 0
Estimated amounts to be amortized | $ (745)

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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- Definition 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. + References No definition available. + Details
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- Definition Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) 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. + References No definition available. + Details
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