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v3.20.1

Description of the business and summary of significant accounting policies - Aircraft, rotable spare parts, furniture and equipment, net (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 MXN ($) agreement engine aircraft | Dec. 31, 2018 MXN ($) agreement engine aircraft | Dec. 31, 2017 agreement | Dec. 31, 2017 engine | Dec. 31, 2017 aircraft | Dec. 31, 2017 | Dec. 31, 2017 MXN ($)
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Maintenance deposits expensed as supplemental rent | $ 295,720 | $ 299,601 |  |  |  |  | $ 265,756
Number of aircraft added to fleet | aircraft | 7 | 10 |  |  | 5 |  |
Number of aircraft with lease term extended | 1 | 2 | 3 |  | 3 |  |
Number of engine agreements for which lease term extended | engine | 1 | 2 |  | 2 |  |  |
Maintenance deposits expensed to contingent rent prior to lease extensions | $ 0 | $ 0 |  |  |  |  | 65,716
Length of time before routine aircraft and engine maintenance is required | 22 months |  |  |  |  |  |
Depreciation | $ 587,849 | 427,756 |  |  |  |  | 496,291
Capitalized borrowing costs | $ 456,313 | $ 357,920 |  |  |  |  | 193,389
Rate used to determine amount of borrowing cost | 5.10% | 4.41% |  |  |  | 3.30% |
Flight equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | $ 84,888 | $ 71,105 |  |  |  |  | 61,204
Constructions and improvements |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | 14,721 | 10,689 |  |  |  |  | 20,216
Computer equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | $ 7,074 | 7,215 |  |  |  |  | 3,809
Annual depreciation rate | 25.00% |  |  |  |  |  |
Workshop tools |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | $ 1,938 | 1,856 |  |  |  |  | 2,314
Annual depreciation rate | 33.30% |  |  |  |  |  |
Electric power equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | $ 1,084 | 1,132 |  |  |  |  | 1,294
Annual depreciation rate | 10.00% |  |  |  |  |  |
Communications equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | $ 933 | 892 |  |  |  |  | 796
Annual depreciation rate | 10.00% |  |  |  |  |  |
Workshop machinery and equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | $ 1,044 | 727 |  |  |  |  | 722
Annual depreciation rate | 10.00% |  |  |  |  |  |
Motorized transport equipment platform |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Annual depreciation rate | 25.00% |  |  |  |  |  |
Service carts on board |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | $ 278 | 256 |  |  |  |  | 376
Annual depreciation rate | 20.00% |  |  |  |  |  |
Office furniture and equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | $ 5,854 | 6,209 |  |  |  |  | 3,801
Annual depreciation rate | 10.00% |  |  |  |  |  |
Leasehold improvements to flight equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Additions | $ 659,082 | 676,457 |  |  |  |  | 529,331
Amortization of major maintenance leasehold improvement | 450,371 | 313,464 |  |  |  |  | 382,745
Depreciation | 469,694 | 327,193 |  |  |  |  | 401,288
Aircraft spare engines |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Depreciation | 1,787 |  |  |  |  |  |
Rotable spare parts, furniture and equipment assets |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Impairment charges on rotable spare parts, furniture and equipment | $ 0 | $ 0 |  |  |  |  | $ 0
Minimum |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Duration of routine aircraft and engine maintenance | 7 days |  |  |  |  |  |
Length of time before major aircraft and engine maintenance is required | 5 years |  |  |  |  |  |
Minimum | Flight equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Annual depreciation rate | 4.00% |  |  |  |  |  |
Maximum |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Duration of routine aircraft and engine maintenance | 14 days |  |  |  |  |  |
Duration of major aircraft and engine maintenance | 42 days |  |  |  |  |  |
Length of time before major aircraft and engine maintenance is required | 6 years |  |  |  |  |  |
Maximum | Flight equipment |  |  |  |  |  |  |
Aircraft, rotable spare parts, furniture and equipment, net |  |  |  |  |  |  |
Annual depreciation rate | 16.70% |  |  |  |  |  |

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