DEBT (Tables)

12 Months Ended

Sep. 30, 2016

DEBT

Schedule of components of unsecured long-term debt outstanding

	Principal				Unamortized Discount and Debt Issuance Costs
	September 30, 2016		September 30, 2015		September 30, 2016			September 30, 2015
	(in thousands)
Unsecured senior notes issued July 21, 2009:
Due July 21, 2016	$	—	$	40,000	$	—		$	(498	)
Unsecured senior notes issued March 19, 2015:
Due March 19, 2025		500,000		500,000		(8,153	)		(7,965	)
		500,000		540,000		(8,153	)		(8,463	)
Less long-term debt due within one year		—		40,000		—			(906	)
Long-term debt	$	500,000	$	500,000	$	(8,153	)	$	(7,557	)

Schedule of aggregate maturities of long-term debt

        At September 30, 2016, aggregate maturities of long-term debt are as follows (in thousands):

Years ending September 30,
2017	$	—
2018		—
2019		—
2020		—
2021		—
Thereafter	$	500,000
	$	500,000