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Condensed Consolidating Financial Statements (Details Textual)
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12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Condensed Consolidating Financial Statements (Textual) | |||
| Percentage owner in subsidiary guarantors | 100.00% | 100.00% | 100.00% |