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Changes in Accumulated Other Comprehensive (Loss) Income (Tables) | 6 Months Ended
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Jun. 30, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Schedule of changes in accumulated other comprehensive income (loss) by component | The following table presents the changes in accumulated other comprehensive income (loss) by component for the six months ended June 30, 2018 and 2017 (in thousands):
| Accumulated Other Comprehensive Income (Loss) for the Six Months Ended June 30, 2018 |  | Accumulated Other Comprehensive Income (Loss) for the Six Months Ended June 30, 2017
| Changes related to cash flow derivative hedges |  | Changes in defined benefit plans |  | Foreign currency translation adjustments |  | Accumulated other comprehensive loss |  | Changes related to cash flow derivative hedges |  | Changes in defined benefit plans |  | Foreign currency translation adjustments |  | Accumulated other comprehensive loss
Accumulated comprehensive loss at beginning of the year | $ | (250,355 | ) |  | $ | (33,666 | ) |  | $ | (50,244 | ) |  | $ | (334,265 | ) |  | $ | (820,850 | ) |  | $ | (28,083 | ) |  | $ | (67,551 | ) |  | $ | (916,484 | )
Other comprehensive income (loss) before reclassifications | 69,932 |  |  | 5,082 |  |  | (10,361 | ) |  | 64,653 |  |  | 43,408 |  |  | (4,847 | ) |  | 8,321 |  |  | 46,882 |
Amounts reclassified from accumulated other comprehensive loss | 3,698 |  |  | 714 |  |  | — |  |  | 4,412 |  |  | 108,007 |  |  | 557 |  |  | — |  |  | 108,564 |
Net current-period other comprehensive income (loss) | 73,630 |  |  | 5,796 |  |  | (10,361 | ) |  | 69,065 |  |  | 151,415 |  |  | (4,290 | ) |  | 8,321 |  |  | 155,446 |
Ending balance | $ | (176,725 | ) |  | $ | (27,870 | ) |  | $ | (60,605 | ) |  | $ | (265,200 | ) |  | $ | (669,435 | ) |  | $ | (32,373 | ) |  | $ | (59,230 | ) |  | $ | (761,038 | )
Schedule of reclassifications out of accumulated other comprehensive income (loss) | The following table presents reclassifications out of accumulated other comprehensive income (loss) for the quarters and six months ended June 30, 2018 and 2017 (in thousands):
|  | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) into Income |  |
Details About Accumulated Other Comprehensive Income (Loss) Components |  | Quarter Ended June 30, 2018 |  | Quarter Ended June 30, 2017 |  | Six Months Ended June 30, 2018 |  | Six Months Ended June 30, 2017 |  | Affected Line Item in Statements of Comprehensive Income (Loss)
Gain (loss) on cash flow derivative hedges: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps |  | $ | (2,138 | ) |  | $ | (7,863 | ) |  | $ | (8,976 | ) |  | $ | (16,720 | ) |  | Interest expense, net of interest capitalized
Foreign currency forward contracts |  | (3,156 | ) |  | (2,710 | ) |  | (6,468 | ) |  | (5,420 | ) |  | Depreciation and amortization expenses
Foreign currency forward contracts |  | 14,601 |  |  | (4,105 | ) |  | 14,643 |  |  | (7,675 | ) |  | Other income (expense)
Foreign currency collar options |  | — |  |  | (602 | ) |  | — |  |  | (1,204 | ) |  | Depreciation and amortization expenses
Fuel swaps |  | (133 | ) |  | 2,498 |  |  | 192 |  |  | 4,775 |  |  | Other income (expense)
Fuel swaps |  | 2,043 |  |  | (41,835 | ) |  | (3,089 | ) |  | (81,763 | ) |  | Fuel
|  | 11,217 |  |  | (54,617 | ) |  | (3,698 | ) |  | (108,007 | ) |  |
Amortization of defined benefit plans: |  |  |  |  |  |  |  |  |  |  |
Actuarial loss |  | (372 | ) |  | (293 | ) |  | (714 | ) |  | (557 | ) |  | Payroll and related
|  | (372 | ) |  | (293 | ) |  | (714 | ) |  | (557 | ) |  |
Total reclassifications for the period |  | $ | 10,845 |  |  | $ | (54,910 | ) |  | $ | (4,412 | ) |  | $ | (108,564 | ) |  |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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