Earnings Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted Average Common Shares
Weighted average Common Shares outstanding									80,360,422	74,156,849	63,038,663
Unvested restricted stock									(1,515,582)	(1,436,702)	(1,315,877)
Weighted average Common Shares - Basic									78,844,840	72,720,147	61,722,786
Dilutive effect of restricted stock									1,144,465		979,260
Dilutive effect of employee stock purchase plan									138,578		68,780
Weighted average Common Shares - Diluted									80,127,883	72,720,147	62,770,826
Net Income (loss)
Income from continuing operations	$ 395	$ 2,507	$ 2,826	$ 2,084	$ 1,739	$ 46	$ 1,489	$ (6,200)	$ 7,812	$ (2,926)	$ 1,060
Less: Net income attributable to noncontrolling interests	(30)	(20)	(20)	0	0	(3)	0	(27)	(70)	(30)	(47)
Income (loss) from continuing operations attributable to common stockholders									7,742	(2,956)	1,013
Discontinued operations	(6,757)	3,328	102	1,050	1,178	604	522	438	(2,277)	2,742	7,187
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON STOCKHOLDERS	$ (6,392)	$ 5,815	$ 2,908	$ 3,134	$ 2,917	$ 647	$ 2,011	$ (5,789)	$ 5,465	$ (214)	$ 8,200
Basic Earnings (Loss) Per Common Share
Income (loss) from continuing operations (in dollars per share)	$ 0.00	$ 0.04	$ 0.04	$ 0.03	$ 0.02	$ 0.00	$ 0.02	$ (0.10)	$ 0.10	$ (0.04)	$ 0.02
Discontinued operations (in dollars per share)	$ (0.07)	$ 0.04	$ 0.00	$ 0.01	$ 0.02	$ 0.01	$ 0.01	$ 0.01	$ (0.03)	$ 0.04	$ 0.11
Net income (loss) attributable to common stockholders (in dollars per share)	$ (0.07)	$ 0.08	$ 0.04	$ 0.04	$ 0.04	$ 0.01	$ 0.03	$ (0.09)	$ 0.07		$ 0.13
Diluted Earnings (Loss) Per Common Share
Income (loss) from continuing operations (in dollars per share)	$ 0.00	$ 0.03	$ 0.04	$ 0.03	$ 0.02	$ 0.00	$ 0.02	$ (0.10)	$ 0.10	$ (0.04)	$ 0.02
Discontinued operations	$ (0.07)	$ 0.04	$ 0.00	$ 0.01	$ 0.02	$ 0.01	$ 0.01	$ 0.01	$ (0.03)	$ 0.04	$ 0.11
Net income (loss) attributable to common stockholders (in dollars per share)	$ (0.07)	$ 0.07	$ 0.04	$ 0.04	$ 0.04	$ 0.01	$ 0.03	$ (0.09)	$ 0.07		$ 0.13