Summary of Significant Accounting Policies (Details 4) (Employee Stock Options [Member], USD $)	12 Months Ended
Jun. 30, 2012 Volatility_Factor	Jun. 30, 2011 Volatility_Factor	Jun. 30, 2010 Volatility_Factor
Employee Stock Options [Member]
Estimated fair value of each option grant
Risk free interest rate	0.97%	2.15%	1.53%
Volatility factor	0.30	0.27	0.31
Weighted average expected life of options (in years)	4 years 9 months	4 years 9 months	4 years
Weighted average estimated grant date fair value	$ 1.73	$ 1.50	$ 1.36

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration