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Supplemental Condensed Consolidating Financial Information (Narrative) (Details)	Mar. 31, 2012
Supplemental Condensed Consolidating Financial Information [Abstract]
Ownership percentage in directly owned subsidiary	100.00%

X

- Details

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Namespace Prefix:	us-gaap_
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X

- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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