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Supplemental Cash Flow Information (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Cash paid for:
Interest	$ 119	$ 10	$ 44
Income taxes	29,837	14,068	12,966
Noncash investing and financing activities:
Accrued capital expenditures			2
Inventory transferred to fixed assets	$ 4,902	$ 2,000	$ 200

The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

The amount of cash paid for interest during the period net of cash paid for interest that is capitalized.