Condensed Consolidating Financial Information (Details Textual)	Jun. 30, 2013	Jun. 30, 2013 Senior Notes Due 2021	Mar. 19, 2013 Senior Notes Due 2023	Jun. 30, 2013 7.75% Senior Notes [Member]
Debt Instrument [Line Items]
Notes bear interest at a rate	7.75%	6.625%	5.125%	7.75%
Percentage of subsidiary owned	100.00%

Interest rate stated in the contractual debt agreement.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant