Accrued Expenses and Other Current Liabilities (Schedule of Product Warranty Accruals) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012
Schedule of Product Warranty Accruals [Abstract]
Balance at beginning of period	$ 4,580	$ 4,686	$ 4,100	$ 4,566
Provision for product warranty - expense	1,772	(86)	2,401	86
Adjustments and utilization of warranty accrual	(2)	(6)	(151)	(58)
Balance at end of period	6,350	4,594	6,350	4,594
Current portion	5,942	4,186	5,942	4,186	3,692
Non-current portion	$ 408	$ 408	$ 408	$ 408

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and due after one year (or beyond the operating cycle if longer) for estimated claims under standard and extended warranty protection rights granted to customers.

+ References+ Details