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Common Stock Repurchases (Details) (USD $)	12 Months Ended
Common Stock Repurchases (Details) (USD $)	Dec. 31, 2012
Summary of share repurchase program
Total Number of Shares Purchased	2,748,659
Average Price Paid Per Share	$ 9.76
Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs	2,748,659
Maximum Number (or approximate Dollar Value) of Shares That May Yet be Purchased Under the Plans or Programs	0

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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