Debt (Tables)

6 Months Ended

12 Months Ended

Mar. 31, 2015

Sep. 30, 2014

DEBT

Components of unsecured long-term debt outstanding

							Unamortized Discount and
	Principal						Debt Issuance Costs
	March 31,			September 30,			March 31,			September 30,
	2015			2014			2015			2014
	(in thousands)
Unsecured senior notes issued July 21, 2009:
Due July 21, 2015	$	40,000		$	40,000		$	112		$	141
Due July 21, 2016	40,000			40,000			113			141
Unsecured revolving credit facility issued May 25, 2012	—			—			471			581
Unsecured senior notes issued March 19, 2015:
Due March 19, 2025	500,000			—			7,189			—
	580,000			80,000			7,885			863
Less long-term debt due within one year	(40,000		)	(40,000		)	(793		)	(365		)
Long-term debt	$	540,000		$	40,000		$	7,092		$	498

	Principal				Unamortized Discount and Debt Issuance Costs
	September 30,
					September 30, 2014		September 30, 2013
	2014		2013
	(in thousands)
Unsecured intermediate debt issued August 15, 2002:
Series D, due August 15, 2014, 6.56%	$	—	$	75,000	$	—	$	27
Unsecured senior notes issued July 21, 2009:
Due July 21, 2014, 6.10%		—		40,000		—		145
Due July 21, 2015, 6.10%		40,000		40,000		141		145
Due July 21, 2016, 6.10%		40,000		40,000		141		146
Unsecured revolving credit facility issued May 25, 2012		—		—		581		800
	$	80,000	$	195,000		863		1,263
Less long-term debt due within one year		40,000		115,000		365		400
Long-term debt	$	40,000	$	80,000	$	498	$	863