v3.3.1.900
Defined Benefit Plans Net Periodic Benefit Cost (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Pension Benefits [Member]      
Service cost $ 4,612 $ 4,883 $ 3,985
Interest cost 54,807 70,469 63,132
Amortization 11,515 6,608 9,672
Settlement loss (gain) (582) 190 (592)
Other 525 328 (154)
Expected return on plan assets (58,107) (69,055) (58,511)
Net periodic benefit cost 12,770 13,423 17,532
Current year net actuarial loss (gain) (33,558) 96,005 (69,463)
Amortization of net loss (11,515) (6,608) (9,672)
Settlement loss (952) (190) (32)
Amortization of prior service cost 0 0 0
Total recognized in Other comprehensive (loss) income (46,025) 89,207 (79,167)
Other Post-Retirement Benefits [Member]      
Service cost 33 155 179
Interest cost 1,170 1,304 1,090
Amortization 259 468 609
Settlement loss (gain) 0 0 0
Other 174 0 125
Expected return on plan assets 0 0 0
Net periodic benefit cost 1,636 1,927 2,003
Current year net actuarial loss (gain) (6,410) 5,553 (6,072)
Amortization of net loss (11) (220) (361)
Settlement loss 0 0 0
Amortization of prior service cost (248) (248) (248)
Total recognized in Other comprehensive (loss) income (6,669) 5,085 (6,681)
Foreign Pension Benefits [Member]      
Service cost 4,506 4,883 3,985
Interest cost 37,253 51,658 46,775
Amortization 4,272 1,669 2,305
Settlement loss (gain) (582) 190 (592)
Other 525 328 (154)
Expected return on plan assets (32,921) (44,287) (34,541)
Net periodic benefit cost 13,053 14,441 17,778
Current year net actuarial loss (gain) (50,216) 38,904 (16,121)
Amortization of net loss (4,272) (1,669) (2,305)
Settlement loss (952) (190) (32)
Amortization of prior service cost 0 0 0
Total recognized in Other comprehensive (loss) income $ (55,440) $ 37,045 $ (18,458)