Commitments and Contingent Liabilities Commitments The Company has commitments with a third-party to provide aircraft maintenance services which include fixed payments as well as variable payments based on flight hours for the Company's Airbus fleet through 2027. The Company also has commitments with third-party service providers for reservations, IT, and accounting services through 2024. Committed capital and other expenditures include escalation and variable amounts based on estimated forecasts. The gross committed expenditures for upcoming aircraft deliveries and other commitments for the next five years and thereafter are detailed below: Aircraft and aircraft related Other Total Committed Expenditures (in thousands) 2020 $ 177,643 $ 83,130 $ 260,773 2021 312,335 82,839 395,174 2022 433,245 72,738 505,983 2023 243,805 65,036 308,841 2024 350,408 57,335 407,743 Thereafter 110,175 131,267 241,442 $ 1,627,611 $ 492,345 $ 2,119,956 As of December 31, 2019 , the Company had the following capital commitments consisting of firm aircraft and engine orders and purchase rights: Aircraft Type Firm Orders Purchase Rights Expected Delivery Dates A321neo aircraft 1 9 In 2020 B787-9 aircraft 10 10 Between 2021 and 2025 Pratt &amp; Whitney spare engines: A321neo spare engines  2 N/A General Electric GEnx spare engines: B787-9 spare engines 2 2 Between 2021 and 2025 In February 2018, the Company exercised its right to terminate its aircraft purchase agreement between the Company and Airbus for six Airbus A330-800neo aircraft and the purchase rights for an additional six Airbus A330-800neo aircraft. Refer to Note 12 for discussion on the contract termination charge. In July 2018, the Company entered into a purchase agreement for the purchase of ten Boeing 787-9 "Dreamliner" aircraft with purchase rights for an additional 10 aircraft with scheduled delivery from 2021 to 2025. In October 2018, the Company entered into a definitive agreement for the selection of GEnx engines to power its Boeing 787-9 fleet. The agreement provides for the purchase of 20 GEnx engines, the right to purchase an additional 20 GEnx engines and the purchase of up to four spare engines. In December 2018, the Company entered into an amendment to the purchase agreement with Boeing, which includes an option for the Company to accelerate delivery of Boeing 787-9 aircraft from 2024 and 2025 to 2023; however, the Company does not currently expect to execute the option to accelerate its planned delivery schedule. The committed expenditures under these agreements are reflected in the table above. The Company also intends to enter into additional related agreements in connection with the Boeing 787-9 purchases, including for the purchase of spare parts and materials and related services. In order to complete the purchase of these aircraft and fund related costs, the Company may need to secure acceptable financing. The Company has backstop financing available from aircraft and engine manufacturers, subject to certain customary conditions. Financing may be necessary to satisfy our capital commitments for firm order aircraft and other related capital expenditures. The Company can provide no assurance that any financing not already in place for aircraft and spare engine deliveries will be available to us on acceptable terms when necessary or at all. Litigation and Contingencies The Company is subject to legal proceedings arising in the normal course of its operations. Management does not anticipate that the disposition of any currently pending proceeding will have a material effect on the Company's operations, business or financial condition. General Guarantees and Indemnifications In the normal course of business, the Company enters into numerous aircraft financing and real estate leasing arrangements that have various guarantees included in the contract. It is common in such lease transactions for the lessee to agree to indemnify the lessor and other related third-parties for tort liabilities that arise out of or relate to the lessee's use of the leased aircraft or occupancy of the leased premises. In some cases, this indemnity extends to related liabilities arising from the negligence of the indemnified parties, but usually excludes any liabilities caused by their gross negligence or willful misconduct. Additionally, the lessee typically indemnifies such parties for any environmental liability that arises out of or relates to its use of the real estate leased premises. The Company believes that it is insured (subject to deductibles) for most tort liabilities and related indemnities described above with respect to the aircraft and real estate that it leases. The Company cannot estimate the potential amount of future payments, if any, under the foregoing indemnities and agreements. Credit Card Holdback Under the Company's bank-issued credit card processing agreements, certain proceeds from advance ticket sales may be held back to serve as collateral to cover any possible chargebacks or other disputed charges that may occur. As of December 31, 2019 and 2018 , there were no holdbacks held with the Company's credit card processors. In the event of a material adverse change in the business, the holdback could increase to an amount up to 100% of the applicable credit card air traffic liability, which would also cause an increase in the level of restricted cash. Labor Negotiations As of December 31, 2019 , approximately 83% of employees were represented by unions. Additionally, the collective bargaining agreement for the AFA, which represents 29% of employees became amendable on January 1, 2017, the Company is currently in negotiations with the AFA. The Company can provide no assurance that a successful or timely resolution of these labor negotiations will be achieved.