XML 90 R75.htm IDEA: XBRL DOCUMENT v3.8.0.1
Other Amounts Recognized in Other Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Settlements, Benefit Obligation   $ (3,500)  
Amortization of prior service (cost) credit $ 1,500 1,700  
Amortization of actuarial (loss) gain 9,200 600  
Pension Benefit Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Settlements, Benefit Obligation 0 (3,482) $ 0
Net (gain) loss (7,901) (1,445) 15,942
Amortization of prior service (cost) credit (8) (22) (73)
Amortization of actuarial (loss) gain (9,874) (11,463) (12,619)
Total recognized in other comprehensive (income) loss (17,783) (16,412) 3,250
Defined Benefit Plan Total Recognized In Net Periodic Benefit Costs And Other Comprehensive Income Before Tax (11,448) (5,200) 11,000
Other Postretirement Employee Benefit Plans      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Settlements, Benefit Obligation 0 0 0
Net (gain) loss (1,253) 818 (30,700)
Amortization of prior service (cost) credit 1,535 1,712 2,178
Amortization of actuarial (loss) gain 6,618 7,566 0
Total recognized in other comprehensive (income) loss 6,900 10,096 (28,522)
Defined Benefit Plan Total Recognized In Net Periodic Benefit Costs And Other Comprehensive Income Before Tax $ 1,654 $ 4,141 $ (26,457)