Accounts and Notes Receivable, net - Narrative (Details) (USD $)	3 Months Ended		6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Receivables [Abstract]
Provision for doubtful accounts	$ (922,000)	$ 590,000	$ (963,000)	$ 737,000	$ (890,000)	$ 880,000	$ (757,000)	$ (980,000)	$ 2,024,000	$ 3,188,000
Increase (decrease) in allownacefor doubtful accounts							$ (800,000)	$ (1,000,000)	$ (400,000)	$ 2,100,000