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Changes in Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2017
Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Schedule of Accumulated Other Comprehensive Income (Loss) | The following table presents the changes in accumulated other comprehensive loss by component for the years ended December 31, 2017 and 2016 (in thousands):
|  | Changes related to cash flow derivative hedges |  | Changes in defined benefit plans |  | Foreign currency translation adjustments |  | Accumulated other comprehensive income (loss)
Accumulated comprehensive loss at January 1, 2015 |  | $ | (826,026 | ) |  | $ | (31,207 | ) |  | $ | (39,761 | ) |  | $ | (896,994 | )
Other comprehensive (loss) income before reclassifications |  | (697,671 | ) |  | 3,053 |  |  | (25,952 | ) |  | (720,570 | )
Amounts reclassified from accumulated other comprehensive loss |  | 291,624 |  |  | 1,707 |  |  | (4,200 | ) |  | 289,131 |
Net current-period other comprehensive (loss) income |  | (406,047 | ) |  | 4,760 |  |  | (30,152 | ) |  | (431,439 | )
Accumulated comprehensive loss at January 1, 2016 |  | (1,232,073 | ) |  | (26,447 | ) |  | (69,913 | ) |  | (1,328,433 | )
Other comprehensive income (loss) before reclassifications |  | 73,973 |  |  | (2,777 | ) |  | 2,362 |  |  | 73,558 |
Amounts reclassified from accumulated other comprehensive loss |  | 337,250 |  |  | 1,141 |  |  | — |  |  | 338,391 |
Net current-period other comprehensive income (loss) |  | 411,223 |  |  | (1,636 | ) |  | 2,362 |  |  | 411,949 |
Accumulated comprehensive loss at January 1, 2017 |  | (820,850 | ) |  | (28,083 | ) |  | (67,551 | ) |  | (916,484 | )
Other comprehensive income (loss) before reclassifications |  | 381,865 |  |  | (6,755 | ) |  | 17,307 |  |  | 392,417 |
Amounts reclassified from accumulated other comprehensive loss |  | 188,630 |  |  | 1,172 |  |  | — |  |  | 189,802 |
Net current-period other comprehensive income (loss) |  | 570,495 |  |  | (5,583 | ) |  | 17,307 |  |  | 582,219 |
Accumulated comprehensive loss at December 31, 2017 |  | $ | (250,355 | ) |  | $ | (33,666 | ) |  | $ | (50,244 | ) |  | $ | (334,265 | )
Reclassification out of Accumulated Other Comprehensive Income | The following table presents reclassifications out of accumulated other comprehensive loss for the years ended December 31, 2017 and 2016 (in thousands):
|  | Amount of Loss Reclassified from Accumulated Other Comprehensive Income (Loss) into Income
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Year Ended December 31, 2017 |  | Year Ended December 31, 2016 |  | Year Ended December 31, 2015 |  | Affected Line Item in Statements of Comprehensive Income (Loss)
Loss on cash flow derivative hedges: |  |  |  |  |  |  |  |
Interest rate swaps |  | (31,603 | ) |  | (41,480 | ) |  | (36,401 | ) |  | Interest expense, net of interest capitalized
Foreign currency forward contracts |  | (10,840 | ) |  | (8,114 | ) |  | (2,871 | ) |  | Depreciation and amortization expenses
Foreign currency forward contracts |  | (9,472 | ) |  | (14,342 | ) |  | 7,580 |  |  | Other expense
Foreign currency forward contracts |  | — |  |  | (207 | ) |  | — |  |  | Other indirect operating expenses
Foreign currency collar options |  | (2,408 | ) |  | (2,408 | ) |  | (1,605 | ) |  | Depreciation and amortization expenses
Fuel swaps |  | 7,382 |  |  | 13,685 |  |  | (9,583 | ) |  | Other expense
Fuel swaps |  | (141,689 | ) |  | (284,384 | ) |  | (248,744 | ) |  | Fuel
|  | (188,630 | ) |  | (337,250 | ) |  | (291,624 | ) |  |
Amortization of defined benefit plans: |  |  |  |  |  |  |  |
Actuarial loss |  | (1,172 | ) |  | (1,141 | ) |  | (1,414 | ) |  | Payroll and related
Prior service costs |  | — |  |  | — |  |  | (293 | ) |  | Payroll and related
|  | (1,172 | ) |  | (1,141 | ) |  | (1,707 | ) |  |
Release of foreign cumulative translation due to sale or liquidation of businesses: |  |  |  |  |  |  |  |
Foreign cumulative translation |  | — |  |  | — |  |  | 4,200 |  |  | Other operating
Total reclassifications for the period |  | $ | (189,802 | ) |  | $ | (338,391 | ) |  | $ | (289,131 | ) |  |

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