Senior Notes (Tables)

9 Months Ended

Jun. 30, 2018

Debt Disclosure [Abstract]

Carrying Amounts and Fair Values of Senior Notes

The following table presents the carrying amounts and fair values for the Senior Notes at June 30, 2018 and September 30, 2017:

	June 30, 2018						September 30, 2017
	Carrying Amounts			Fair Value			Carrying Amounts			Fair Value
	(In thousands)
The 2008 Senior Notes	$	—		$	—		$	131,000		$	134,250
The 2010 Senior Notes	113,000			114,966			113,000			119,106
The 2018 Senior Notes	400,000			402,000			—			—
Debt issuance costs	(6,287		)	(6,287		)	(199		)	(199		)
Total	$	506,713		$	510,679		$	243,801		$	253,157