CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Net (loss) income	$ (10,320)		$ 20,374		$ 101,572		$ 108,810
Other comprehensive income (Loss), net of tax
Unrealized gain (loss) on available for sale securities, net of tax of $ (79), $141, $(104) and $(411), respectively	114	[1]	(205)	[1]	150	[1]	595	[1]
Net unrealized (loss) gain on derivatives, net of tax of $8, $(1), $49 and $(56), respectively	(14)		2		(84)		97
Adjustment to postemployment benefit obligation, net of tax of $(149), $0, $(448) and $0, respectively	220		0		658		0
Other comprehensive income (loss)	320		(203)		724		692
Comprehensive (loss) income	$ (10,000)		$ 20,171		$ 102,296		$ 109,502

[1] Available for sale securities are included in other noncurrent assets in the Unaudited Condensed Consolidated Balance Sheets.