Fair Value Measurements (Narrative) (Details) (USD $)	9 Months Ended		0 Months Ended
Mar. 31, 2014	Jun. 30, 2013	Jan. 21, 2011 7 3/8% Senior Notes [Member]	Mar. 31, 2014 7 3/8% Senior Notes [Member]	Jun. 30, 2013 7 3/8% Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Aggregate principle amount	$ 350,000,000	$ 250,000,000	$ 250,000,000
Debt instrument, stated interest rate	7.375%		7.375%	7.375%	7.375%
Debt instrument, maturity	Mar. 01, 2021		Mar. 01, 2021

Face (par) amount of debt instrument at time of issuance.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant