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Equity (Details)	3 Months Ended
Equity (Details)	Mar. 31, 2013	Mar. 31, 2012
Common stock at beginning of period	38,558,048	30,710
Issuance of common stock	25,530	0
Issuance of restricted stock	357	371
Forfeiture of restricted stock	(15)	0
Common stock at end of period	64,429,542	31,081

Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.