Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2013

Equity [Abstract]

Schedule of Common Stock Outstanding Roll Forward [Table Text Block]

The following table presents a summary of the changes in the number of common shares outstanding for the periods presented:

	2013		2012
Balance as of January 1,	54,268,915		40,382,530
Common stock issued under DRIP	515,257		13,480
Common stock issued under ATM program	180,986		402,494
Common stock issued or redeemed under stock and incentive plans	270,158		241,663
Common stock issued via public offering	—		13,332,748
Common stock forfeited for tax withholding on share-based compensation	(52,385	)	—
Common stock repurchased during the period (weighted average price of $8.09 and $8.86 per share, respectively)	(872,447	)	(104,000	)
Balance as of December 31,	54,310,484		54,268,915

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

The following table presents a rollforward of the restricted stock activity for the periods indicated:

	Year Ended
	December 31,
	2013		2012
Restricted stock outstanding as of beginning of period	448,283		365,506
Restricted stock granted	255,158		220,821
Restricted stock vested	(182,472	)	(138,044	)
Restricted stock outstanding as of end of period	520,969		448,283