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Earnings per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Earnings per Share |  |  |  |
Income from continuing operations | $ 13,143 | $ 12,361 | $ 26,090 | $ 24,634
Less net income allocated to non-controlling interests | (10) | (48) | (21) | (96)
Less net income allocated to participating securities: |  |  |  |
Nonforfeitable dividends on participating securities | (91) | (85) | (185) | (174)
Total net income allocated to participating securities | (91) | (85) | (185) | (174)
Less net income allocated to preferred stockholders: |  |  |  |
Preferred stock dividends | (818) | (818) | (1,636) | (3,876)
Preferred stock redemption charge |  |  |  | (3,566)
Total net income allocated to preferred stockholders | (818) | (818) | (1,636) | (7,442)
Income from continuing operations available to common stockholders | 12,224 | 11,410 | 24,248 | 16,922
Discontinued operations: |  |  |  |
Loss from discontinued operations | (30) | (99) | (61) | (218)
Gain on sale of assets, net |  |  | 16 |
Net loss from discontinued operations | (30) | (99) | (45) | (218)
Net income available to common stockholders | 12,194 | 11,311 | 24,203 | 16,704
Net income for diluted net income per share | $ 12,194 | $ 11,311 | $ 24,203 | $ 16,704
Shares for basic net income per share | 30,213 | 30,135 | 30,201 | 28,233
Effect of dilutive securities: |  |  |  |
Stock options (in shares) | 45 | 33 | 45 | 31
Shares for diluted net income per share | 30,258 | 30,168 | 30,246 | 28,264
Basic net income per share | $ 0.40 | $ 0.38 | $ 0.80 | $ 0.59
Diluted net income per share | $ 0.40 | $ 0.37 | $ 0.80 | $ 0.59

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