Cash Flows, Supplemental and Noncash Disclosures (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Supplemental Disclosures [Abstract]
Cash Paid For Interest	$ 589	$ 416
Cash Paid for Income Taxes	23,050	14,436
Noncash Activities [Abstract]
Issuance Of Restricted Common Stock For Asset Acquisition	7,158	0
Capital lease asset additions and related obligations	140	0
Equipment Acquisitions Financed With Accounts Payable	$ 145	$ 102