Contingencies - Warranty (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance at beginning of period	$ 12,561	$ 13,601	$ 11,663	$ 15,477
Accruals for warranties issued	1,517	1,398	3,687	4,128
Changes in liability related to warranties existing in prior periods	2,459	256	5,682	(1,483)
Payments made	(2,756)	(1,810)	(7,251)	(4,677)
Balance at end of period	$ 13,781	$ 13,445	$ 13,781	$ 13,445