Summary of Significant Accounting Policies - Product Warranties (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance, beginning of year	$ 4,710	$ 4,564	$ 3,579
Provision for warranty	12,226	9,606	8,473
Costs charged to accrual	(12,127)	(8,518)	(6,629)
Change in estimated liability for pre-existing warranties	713	(942)	(859)
Balance, end of year	$ 5,522	$ 4,710	$ 4,564
Minimum [Member]
Product Warranty [Line Items]
Product Warranty Period	15 months
Maximum [Member]
Product Warranty [Line Items]
Product Warranty Period	39 months