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Subsequent Events (Details) | 6 Months Ended
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Jun. 30, 2012
Principal amount of redemption prices |
Redemption Prices, Beginning on July 15, 2017 | 103.50%
Redemption Prices, Beginning on July 15, 2018 | 102.333%
Redemption Prices, Beginning on July 15, 2019 | 101.167%
Redemption Prices, Beginning on July 15, 2020 and thereafter | 100.00%

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