Property and Equipment (Details Textuals) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Property and Equipment (Textuals) [Abstract]
Depreciation expense	$ 23,289	$ 17,489	$ 14,030
Carrying Amount	260,379	207,392
Accumulated Depreciation	152,248	128,894
Software [Member]
Property and Equipment (Textuals) [Abstract]
Depreciation expense	2,900	1,400	900
Carrying Amount	38,059	28,653
Accumulated Depreciation	25,947	23,238
Capital lease equipment [Member]
Property and Equipment (Textuals) [Abstract]
Depreciation expense	100
Carrying Amount	1,600	0
Accumulated Depreciation	$ 116	$ 0

The cumulative amount of depreciation, depletion and amortization (related to property, plant and equipment, but not including land) that has been recognized in the income statement.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

Gross amount, at the balance sheet date, of long-lived physical assets used in the normal conduct of business and not intended for resale. This can include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.

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