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EARNINGS PER SHARE (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Earning Per Share |  |  |  |
Net Income attributable to Radnet, Inc.'s common stockholders | $ 2,946 | $ 3,521 | $ 2,835 | $ 2,645
Weighted average number of common shares outstanding during the year | 37,761,316 | 37,357,840 | 37,715,723 | 37,308,038
Basic income per share attributable to Radnet, Inc.'s common stockholders | $ 0.08 | $ 0.09 | $ 0.08 | $ 0.07
Nonvested restricted stock subject only to service vesting | 521,667 |  | 494,744 |
Additional shares issuable upon exercise of stock options and warrants | 1,147,734 | 2,462,323 | 1,005,165 | 2,068,920
Weighted average number of common shares used in calculating diluted income per share | 39,430,717 | 39,820,163 | 39,215,632 | 39,376,958
Diluted income per share attributable to RadNet, Inc.'s common stockholders | $ 0.07 | $ 0.09 | $ 0.07 | $ 0.07

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