Summary Of Significant Accounting Policies (Consolidated Statement Of Cash Flows) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Cash flows provided by operating activities:
(Decrease) increase in accounts payable and other accrued liabilities	$ (596)	[1]	$ 3,305	[1]	$ 169	[1]
Net cash provided by operating activities	25,750	[1]	36,840	[1]	31,729	[1]
Cash flows used by investing activities:
Acquisition of property, plant & equipment	(9,145)	[1]	(14,519)	[1]	(13,415)	[1]
Net cash used by investing activities	(11,296)	[1]	(125,456)	[1]	(17,841)	[1]
Previously Reported [Member]
Cash flows provided by operating activities:
(Decrease) increase in accounts payable and other accrued liabilities	(3,389)		3,982		(323)
Net cash provided by operating activities	22,957		37,517		31,237
Cash flows used by investing activities:
Acquisition of property, plant & equipment	(6,352)		(15,196)		(12,923)
Net cash used by investing activities	(8,503)		(126,133)		(17,349)
Adjustments [Member]
Cash flows provided by operating activities:
(Decrease) increase in accounts payable and other accrued liabilities	2,793		(677)		492
Net cash provided by operating activities	2,793		(677)		492
Cash flows used by investing activities:
Acquisition of property, plant & equipment	(2,793)		677		(492)
Net cash used by investing activities	$ (2,793)		$ 677		$ (492)

[1] Restated