Debt Obligations (Tables)

12 Months Ended

Dec. 31, 2021

Debt Disclosure [Abstract]

Schedule of notes payable

Debt obligations consisted of the following:

	As of December 31,
	2021		2020
	(in thousands)
Credit facility at a floating rate of interest of one-month LIBOR plus 1.75% at December 31, 2021, secured by engines. The facility has a committed amount of $1.0 billion at December 31, 2021, which revolves until the maturity date of June 2024	$	590,000	$	777,000
WEST VI Series A 2021 term notes payable at a fixed rate of interest of 3.10%, maturing in May 2046, secured by engines	273,723		—
WEST VI Series B 2021 term notes payable at a fixed rate of interest of 5.44%, maturing in May 2046, secured by engines	38,022		—
WEST VI Series C 2021 term notes payable at a fixed rate of interest of 7.39%, maturing in May 2046, secured by engines	18,158		—
WEST V Series A 2020 term notes payable at a fixed rate of interest of 3.23%, maturing in March 2045, secured by engines	272,909		286,863
WEST V Series B 2020 term notes payable at a fixed rate of interest of 4.21%, maturing in March 2045, secured by engines	38,004		39,855
WEST V Series C 2020 term notes payable at a fixed rate of interest of 6.66%, maturing in March 2045, secured by engines	16,342		19,043
WEST IV Series A 2018 term notes payable at a fixed rate of interest of 4.75%, maturing in September 2043, secured by engines	262,260		277,481
WEST IV Series B 2018 term notes payable at a fixed rate of interest of 5.44%, maturing in September 2043, secured by engines	38,885		39,640
WEST III Series A 2017 term notes payable at a fixed rate of interest of 4.69%, maturing in August 2042, secured by engines	223,815		227,138
WEST III Series B 2017 term notes payable at a fixed rate of interest of 6.36%, maturing in August 2042, secured by engines	32,195		32,481
Note payable at three-month LIBOR plus a margin ranging from 1.85% to 2.50%, repaid in May 2021, secured by engines	—		6,138
Note payable at a fixed rate of interest of 3.18%, maturing in July 2024, secured by an aircraft	5,307		7,247
	1,809,620		1,712,886
Less: unamortized debt issuance costs	(19,356)		(19,133)
Total debt obligations	$	1,790,264	$	1,693,753

Schedule or principal outstanding

Principal outstanding at December 31, 2021, is expected to be repayable as follows:

Year	(in thousands)
2022	$	79,726
2023	63,069
2024	652,236
2025	61,001
2026	280,029
Thereafter	673,559
Total	$	1,809,620