XML 70 R52.htm IDEA: XBRL DOCUMENT v3.6.0.2
Employee Benefit Plans (Schedule of Effect of One-percentage Point Change in Assumed Health Care Cost Trend Rates) (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Pension Benefit Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Effect on Current Year's Service and Interest Cost - Increase $ 673
Effect on Projected Benefit Obligation - Increase 8,410
Other Benefits Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Effect on Current Year's Service and Interest Cost - Decrease (514)
Effect on Projected Benefit Obligation - Decrease $ (6,633)