Stockholders' Equity (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Weighted average Common Shares outstanding
Weighted average Common Shares outstanding	88,717,028	77,945,505
Nonvested shares	(1,822,692)	(1,518,796)
Weighted average Common Shares—Basic	86,894,336	76,426,709
Dilutive effect of restricted stock	1,282,722	1,087,873
Dilutive effect of employee stock purchase plan	205,378	126,460
Weighted average Common Shares outstanding—Diluted	88,382,436	77,641,042
Net Income (Loss)
Income from continuing operations	$ 2,125	$ 1,496
Noncontrolling interests’ share in net income	19	0
Income from continuing operations attributable to common stockholders	2,144	1,496
Discontinued operations	(3,143)	1,638
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ (999)	$ 3,134
Basic Earnings (Loss) Per Common Share
Income (loss) from continuing operations (in dollars per share)	$ 0.02	$ 0.02
Discontinued operations (in dollars per share)	$ (0.03)	$ 0.02
Net income (loss) attributable to common stockholders (in dollars per share)	$ (0.01)	$ 0.04
Diluted Earnings (Loss) Per Common Share
Income (loss) from continuing operations (in dollars per share)	$ 0.02	$ 0.02
Discontinued operations (in dollars per share)	$ (0.03)	$ 0.02
Net income (loss) attributable to common stockholders (in dollars per share)	$ (0.01)	$ 0.04