Debt (Tables)

9 Months Ended

Jun. 30, 2016

Debt

Schedule of components of unsecured long-term debt outstanding

					Unamortized Discount and
	Principal				Debt Issuance Costs
	June 30,		September 30,		June 30,			September 30,
	2016		2015		2016			2015
	(in thousands)
Unsecured senior notes issued July 21, 2009:
Due July 21, 2016	$	40,000	$	40,000	$	(213	)	$	(498	)
Unsecured senior notes issued March 19, 2015:
Due March 19, 2025	500,000		500,000		(7,403		)	(7,965		)
	540,000		540,000		(7,616		)	(8,463		)
Less long-term debt due within one year	40,000		40,000		(766		)	(906		)
Long-term debt	$	500,000	$	500,000	$	(6,850	)	$	(7,557	)