Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2019

Commitments and Contingencies Disclosure [Abstract]

Lessee, Operating Lease, Liability, Maturity [Table Text Block]

As of December 31, 2019, the maturities of operating lease liabilities are as follows (in thousands):

	Operating Leases
2020	$	14,549
2021	10,425
2022	6,764
2023	6,138
2024	4,940
2025 and beyond	5,155
Total undiscounted cash payments	47,971
Less: amount representing interest	(4,780		)
Present value of future minimum lease payments	43,191
Less: current obligations under leases	12,857
Long-term lease obligation	$	30,334

Schedule of Future Minimum Rental Payments for Operating Leases

The future minimum lease payments of the Company as of December 31, 2018 are scheduled below (in thousands):

	Operating Leases
2019	$	17,505
2020	15,418
2021	12,703
2022	6,735
2023	4,641
2024 and beyond	12,462
Total minimum lease payments	$	69,464

Schedules of Concentration of Risk, by Risk Factor

As of December 31, 2019, the flight crewmember employees of ABX, ATI and Omni and flight attendant employees of ATI and Omni were represented by the labor unions listed below:

Airline	Labor Agreement Unit	Percentage of the Company’s Employees
ABX	International Brotherhood of Teamsters	5.3%
ATI	Air Line Pilots Association	8.3%
OAI	International Brotherhood of Teamsters	7.1%
ATI	Association of Flight Attendants	0.9%
OAI	Association of Flight Attendants	7.3%