Notes Payable (Tables)

12 Months Ended

Dec. 31, 2013

Notes Payable

Schedule of notes payable

	As of December 31,
	2013		2012
	(in thousands)
Credit facility at a floating rate of interest of LIBOR plus 3.00%, secured by engines. The facility has a committed amount of $450.0 million and $430.0 million at December 31, 2013 and 2012, respectively, which revolves until the maturity date of November 2016.	$	362,000	$	282,000
WEST II Series 2012-A term notes payable at a fixed rate of interest of 5.50%, maturing in September 2037. Secured by engines.	370,614		386,724
Note payable at a variable interest rate of LIBOR plus 4.00%, maturing in May 2017, secured by engines.	30,000		—
Note payable at a fixed interest rate of 4.50%, maturing in January 2014. Secured by engines.	15,827		17,338
Note payable at a fixed rate of 5.50%, maturing in September 2017. Secured by one engine.	8,173		8,593
Note payable at a fixed interest rate of 3.94%, maturing in September 2014. Secured by an aircraft.	1,000		2,333
Total notes payable	$	787,614	$	696,988

Schedule of principal outstanding repayable

Year	(in thousands)
2014	$	42,024
2015	32,934
2016 (includes $362.0 million outstanding on revolving credit facility)	388,215
2017	37,373
2018	23,468
Thereafter	263,600
	$	787,614