Debt Obligations (Tables)

12 Months Ended

Dec. 31, 2017

Debt Obligations

Schedule of notes payable

	As of December 31,
	2017		2016
	(in thousands)
Credit facility at a floating rate of interest of one-month LIBOR plus 1.50% at December 31, 2017, secured by engines. The facility has a committed amount of $890.0 million at December 31, 2017, which revolves until the maturity date of April 2021	$	491,000	$	608,000
WEST III Series A 2017-1 term notes payable at a fixed rate of interest of 4.69%, maturing in August 2042, secured by engines		289,295		—
WEST III Series B 2017-1 term notes payable at a fixed rate of interest of 6.36%, maturing in August 2042, secured by engines		41,370		—
WEST II Series 2012-A term notes payable at a fixed rate of interest of 5.50%, maturing in September 2037, secured by engines		259,022		279,541
Note payable at fixed interest rates ranging from 2.60% to 2.97%, maturing in July 2024, secured by an aircraft		12,720		14,453
Note payable at a variable interest rate of one-month LIBOR plus 2.25%, maturing in January 2018, secured by engines		10,336		11,709
		1,103,743		913,703
Less: unamortized debt issuance costs		(18,338)		(13,448)
Total debt obligations	$	1,085,405	$	900,255

Schedule or principal outstanding

Year	(in thousands)
2018	$	48,401
2019		38,537
2020		38,137
2021 (includes $491.0 million outstanding on revolving credit facility)		529,374
2022		190,889
Thereafter		258,405
	$	1,103,743