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Goodwill and Other Intangible Assets (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Classification of amortization recognized as expense
Amortization expense	$ 1,322	$ 1,697	$ 2,045	$ 1,924
Operations expense	32	23	67	49
Interest expense	760	444	1,524	595
Total expense from the amortization of definite-lived intangible assets	$ 2,114	$ 2,164	$ 3,636	$ 2,568

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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