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CONSOLIDATED STATEMENTS OF NET INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2014 | Mar. 31, 2013
Net patient revenues | $ 68,397 | $ 61,432
Other revenues | 1,370 | 1,324
Net revenues | 69,767 | 62,756
Clinic operating costs: |  |
Salaries and related costs | 37,942 | 34,059
Rent, clinic supplies, contract labor and other | 14,216 | 12,734
Provision for doubtful accounts | 950 | 1,097
Closure costs | 13 | 18
Total clinic operating costs | 53,121 | 47,908
Gross margin | 16,646 | 14,848
Corporate office costs | 7,132 | 6,413
Operating income from continuing operations | 9,514 | 8,435
Interest and other income, net | 1 | 2
Interest expense | (253) | (135)
Income before taxes from continuing operations | 9,262 | 8,302
Provision for income taxes | 2,939 | 2,493
Net income from continuing operations including non-controlling interests | 6,323 | 5,809
Discontinued operations, net of tax |  | (200)
Net income including non-controlling interests | 6,323 | 5,609
Less: net income attributable to non-controlling interests | (2,095) | (1,888)
Net income attributable to common shareholders | 4,228 | 3,721
Basic earnings per share attributable to common shareholders: |  |
From continuing operations | $ 0.35 | $ 0.32
From discontinued operations |  | $ (0.01)
Income (loss) from operations before, per basic share | $ 0.35 | $ 0.31
Revaluation of redeemable non-controlling interests, net of tax (Note 4) | $ (0.08) |
Basic | $ 0.27 | $ 0.31
Diluted earnings per share attributable to common shareholders: |  |
From continuing operations | $ 0.35 | $ 0.32
From discontinued operations |  | $ (0.01)
Income (loss) from operations before, Per diluted share | $ 0.35 | $ 0.31
Revaluation of redeemable non-controlling interests, net of tax (Note 4) | $ (0.08) |
Diluted | $ 0.27 | $ 0.31
Shares used in computation: |  |
Basic | 12,129 | 11,955
Diluted | 12,144 | 11,979
Dividends declared per common share | $ 0.12 | $ 0.10
Earnings attributable to common shareholders: |  |
From continuing operations | 4,228 | 3,851
From discontinued operations |  | (130)
Net income attributable to common shareholders | $ 4,228 | $ 3,721

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