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Debt Obligations
3 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Debt Obligations Debt Obligations
Debt obligations consisted of the following:
March 31,
2023
December 31,
2022
(in thousands)
Credit facility at a floating rate of interest of one-month LIBOR plus 1.75% at March 31, 2023, secured by engines. The facility has a committed amount of $1.0 billion at March 31, 2023, which revolves until the maturity date of June 2024
$742,000 $727,000 
WEST VI Series A 2021 term notes payable at a fixed rate of interest of 3.10%, maturing in May 2046, secured by engines and one airframe
259,738 262,779 
WEST VI Series B 2021 term notes payable at a fixed rate of interest of 5.44%, maturing in May 2046, secured by engines and one airframe
36,080 36,502 
WEST VI Series C 2021 term notes payable at a fixed rate of interest of 7.39%, maturing in May 2046, secured by engines and one airframe
14,109 14,738 
WEST V Series A 2020 term notes payable at a fixed rate of interest of 3.23%, maturing in March 2045, secured by engines
251,639 255,136 
WEST V Series B 2020 term notes payable at a fixed rate of interest of 4.21%, maturing in March 2045, secured by engines
35,055 35,542 
WEST V Series C 2020 term notes payable at a fixed rate of interest of 6.66%, maturing in March 2045, secured by engines
12,669 13,314 
WEST IV Series A 2018 term notes payable at a fixed rate of interest of 4.75%, maturing in September 2043, secured by engines
231,268 238,072 
WEST IV Series B 2018 term notes payable at a fixed rate of interest of 5.44%, maturing in September 2043, secured by engines
36,241 36,386 
WEST III Series A 2017 term notes payable at a fixed rate of interest of 4.69%, maturing in August 2042, secured by engines
198,785 209,061 
WEST III Series B 2017 term notes payable at a fixed rate of interest of 6.36%, maturing in August 2042, secured by engines
30,255 30,255 
Note payable at a fixed rate of interest of 3.18%, maturing in July 2024, secured by an aircraft
2,792 3,304 
1,850,631 1,862,089 
Less: unamortized debt issuance costs(13,743)(14,811)
Total debt obligations$1,836,888 $1,847,278 

One-month LIBOR was 4.86% and 4.39% as of March 31, 2023 and December 31, 2022, respectively.

Principal outstanding at March 31, 2023, is expected to be repayable as follows:
Year(in thousands)
2023$57,142 
2024802,931 
202559,695 
2026265,083 
2027191,466 
Thereafter474,314 
Total$1,850,631 
Virtually all of the above debt requires ongoing compliance with certain financial covenants, including debt/equity ratios, minimum tangible net worth and minimum interest coverage ratios, and other eligibility criteria including customer and geographic concentration restrictions. The Company also has certain negative financial covenants such as liens, advances, change in business, sales of assets, dividends and stock repurchases. These covenants are tested either monthly, quarterly or annually, and the Company was in full compliance with all financial covenant requirements at March 31, 2023.