XML 56 R45.htm IDEA: XBRL DOCUMENT v3.8.0.1
Net Periodic Benefit Cost (Details) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net $ 4,149,000 $ 4,319,000 $ 12,509,000 $ 12,934,000
Interest cost on projected benefit obligations 3,381,000 3,575,000 9,630,000 11,438,000
Expected return on plan assets (9,594,000) (10,045,000) (27,847,000) (30,932,000)
Recognition of prior service cost (1,806,000) (1,757,000) (5,024,000) (5,264,000)
Recognition of actuarial losses/(gains) 6,841,000 5,753,000 20,152,000 17,265,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment     0 7,963,000
Net periodic pension cost/(credit) 2,971,000 1,845,000 9,420,000 13,404,000
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement       14,600,000
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), before Tax     0 (8,189,000.0)
Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net 141,000 103,000 423,000 328,000
Interest cost on projected benefit obligations 1,094,000 1,014,000 3,282,000 3,414,000
Expected return on plan assets (1,684,000) (1,868,000) (5,052,000) (5,912,000)
Recognition of prior service cost 0 0 0 0
Recognition of actuarial losses/(gains) 1,639,000 1,907,000 4,917,000 5,699,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment     0 7,963,000
Net periodic pension cost/(credit) 1,190,000 1,156,000 3,570,000 11,492,000
Defined Benefit Plan, Settlement Loss after tax       (4,900,000)
Other Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net 4,008,000 4,216,000 12,086,000 12,606,000
Interest cost on projected benefit obligations 2,269,000 2,542,000 6,294,000 7,967,000
Expected return on plan assets (7,910,000) (8,177,000) (22,795,000) (25,020,000)
Recognition of prior service cost (1,611,000) (1,288,000) (4,439,000) (3,856,000)
Recognition of actuarial losses/(gains) 5,676,000 4,519,000 16,657,000 13,585,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment     0 0
Net periodic pension cost/(credit) 2,432,000 1,812,000 $ 7,803,000 5,282,000
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year, Description     19400  
Other Postretirement Benefits Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost, net 0 0 $ 0 0
Interest cost on projected benefit obligations 18,000 19,000 54,000 57,000
Expected return on plan assets 0 0 0 0
Recognition of prior service cost (195,000) (469,000) (585,000) (1,408,000)
Recognition of actuarial losses/(gains) (474,000) (673,000) (1,422,000) (2,019,000)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment     0 0
Net periodic pension cost/(credit) $ (651,000) $ (1,123,000) $ (1,953,000) $ (3,370,000)
Defined Benefit Plan, Expected Future Employer Contributions, Current Fiscal Year, Description     500