Years Ended January 31, | |||||||||||||||||||
Pension Benefits | Other Postretirement Benefits | ||||||||||||||||||
(in thousands) | 2014 | 2013 | 2012 | 2014 | 2013 | 2012 | |||||||||||||
Service cost | $ | 19,127 | $ | 18,058 | $ | 14,105 | $ | 2,791 | $ | 2,382 | $ | 2,198 | |||||||
Interest cost | 27,005 | 26,796 | 25,321 | 2,762 | 2,839 | 3,101 | |||||||||||||
Expected return on plan assets | (22,240 | ) | (20,416 | ) | (18,716 | ) | — | — | — | ||||||||||
Amortization of prior service cost | 972 | 1,015 | 1,065 | (659 | ) | (659 | ) | (659 | ) | ||||||||||
Amortization of net loss | 19,010 | 15,964 | 7,026 | 212 | 29 | 16 | |||||||||||||
Net periodic benefit cost | 43,874 | 41,417 | 28,801 | 5,106 | 4,591 | 4,656 | |||||||||||||
Net actuarial (gain) loss | (71,179 | ) | 34,080 | 116,703 | (15,131 | ) | 440 | 9,111 | |||||||||||
Recognized actuarial loss | (19,005 | ) | (15,964 | ) | (7,026 | ) | (212 | ) | (29 | ) | (16 | ) | |||||||
Recognized prior service (cost) credit | (972 | ) | (1,015 | ) | (1,065 | ) | 659 | 659 | 659 | ||||||||||
Total recognized in other comprehensive earnings | (91,156 | ) | 17,101 | 108,612 | (14,684 | ) | 1,070 | 9,754 | |||||||||||
Total recognized in net periodic benefit cost and other comprehensive earnings | $ | (47,282 | ) | $ | 58,518 | $ | 137,413 | $ | (9,578 | ) | $ | 5,661 | $ | 14,410 | |||||