Share-based Compensation (Details) (USD $) In Thousands, unless otherwise specified		9 Months Ended					9 Months Ended	93 Months Ended	9 Months Ended				122 Months Ended	9 Months Ended
	Mar. 31, 2013 item	Mar. 31, 2013 Maximum	Mar. 31, 2013 Restricted stock	Mar. 31, 2012 Restricted stock	Jun. 30, 2012 Restricted stock	Jun. 30, 2011 Restricted stock	Mar. 31, 2013 2006 LTIP	Mar. 31, 2013 2006 LTIP	Mar. 31, 2013 2006 LTIP Restricted stock	Mar. 31, 2013 2011 LTIP	Mar. 31, 2013 2011 LTIP Restricted stock	Mar. 31, 2013 2003 Plan	Mar. 31, 2013 2003 Plan	Mar. 31, 2013 Old Plan
Stock-based Compensation
Number of share-based employee compensation plans	4
Options outstanding (in shares)	2,573
Options issued (in shares)							1,401			481		691
Shares authorized							2,500	2,500		1,500		1,125	1,125
Options exercised (in shares)								377					167
Nonvested restricted shares outstanding				74	74	155
Shares already vested under a plan since its inception			111	113					708		3
Shares for future issuances							14	14		1,016
Other disclosures
Share-based compensation awards vesting period		3 years
Share-based compensation awards maximum contractual term		10 years
Total unrecognized compensation cost related to non-vested share-based compensation awards granted under the Plans			$ 1,616
Weighted average period during which the cost is expected to be recognized			2 years 1 month 6 days
Number of further shares authorized to be issued														0