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SUMMARY OF QUARTERLY FINANCIAL INFORMATION Quarterly Financial Information Disclosure (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 0 Months Ended | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Nov. 29, 2011 | Feb. 27, 2013 | 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
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  | $ 37,141 | $ 34,648 | $ 32,723 | $ 29,913 | $ 28,783 | $ 27,356 | $ 29,206 | $ 29,733 | $ 134,425 | $ 115,078 | $ 116,390
Income from continuing operations |  |  | 8,682 | 6,238 | 5,677 | 3,437 | 3,462 | 3,514 | 3,841 | 7,897 | 24,034 | 18,713 | 28,233
Income from discontinued operations attributable to Common Shareholders |  |  | 12,594 | 1,343 | 1,162 | 573 | 4,425 | 497 | 26,393 | 1,526 | 15,672 | 32,842 | 1,824
Net income attributable to Common Shareholders |  |  | $ 21,276 | $ 7,581 | $ 6,839 | $ 4,010 | $ 7,887 | $ 4,011 | $ 30,234 | $ 9,423 | $ 39,706 | $ 51,555 | $ 30,057
Net income attributable to Common Shareholders per Common Share - basic: |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations (in dollars per share) |  |  | $ 0.17 | $ 0.13 | $ 0.13 | $ 0.08 | $ 0.08 | $ 0.09 | $ 0.09 | $ 0.19 | $ 0.51 | $ 0.45 | $ 0.69
Income from discontinued operations (in dollars per share) |  |  | $ 0.25 | $ 0.03 | $ 0.02 | $ 0.01 | $ 0.10 | $ 0.01 | $ 0.64 | $ 0.04 | $ 0.34 | $ 0.80 | $ 0.04
Net income per share (in dollars per share) |  |  | $ 0.42 | $ 0.16 | $ 0.15 | $ 0.09 | $ 0.18 | $ 0.10 | $ 0.73 | $ 0.23 | $ 0.85 | $ 1.25 | $ 0.73
Net income attributable to Common Shareholders per Common Share - diluted: |  |  |  |  |  |  |  |  |  |  |  |  |
Income from continuing operations (in dollars per share) |  |  | $ 0.17 | $ 0.13 | $ 0.13 | $ 0.08 | $ 0.08 | $ 0.09 | $ 0.09 | $ 0.19 | $ 0.51 | $ 0.45 | $ 0.69
Income from discontinued operations (in dollars per share) |  |  | $ 0.25 | $ 0.03 | $ 0.02 | $ 0.01 | $ 0.11 | $ 0.01 | $ 0.64 | $ 0.04 | $ 0.34 | $ 0.80 | $ 0.04
Net income per share (in dollars per share) |  |  | $ 0.42 | $ 0.16 | $ 0.15 | $ 0.09 | $ 0.19 | $ 0.10 | $ 0.73 | $ 0.23 | $ 0.85 | $ 1.25 | $ 0.73
Cash dividends declared per Common Share | $ 0.18 | $ 0.21 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.72 | $ 0.72 | $ 0.72
Weighted average Common Shares outstanding: |  |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | 50,046,774 | 46,338,218 | 44,245,401 | 42,735,731 | 41,785,261 | 40,339,958 | 40,333,575 | 40,317,603 |  |  |
Diluted |  |  | 50,582,584 | 46,812,349 | 44,673,565 | 43,146,093 | 42,066,390 | 40,628,781 | 40,633,317 | 40,580,173 | 46,335,000 | 40,986,000 | 40,406,000

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