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NOTE 16 - QUARTERLY RESULTS OF OPERATIONS (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
Note 16 - Quarterly Results Of Operations Details |  |  |  |  |  |  |  |  |  |  |
Net service fee revenue | $ 159,333 | $ 160,453 | $ 165,351 | $ 162,016 | $ 155,349 | $ 143,021 | $ 147,699 | $ 139,052 |  |  |
Total operating expenses | 152,661 | 146,613 | 151,886 | 150,765 | 140,204 | 132,041 | 132,562 | 129,653 | 601,925 | 534,460 | 476,944
Total other expenses | 13,038 | 9,738 | 12,131 | 12,420 | 11,982 | 11,736 | 12,461 | 11,544 | 47,327 | 47,723 | 58,774
Equity in earnings of joint ventures | 2,319 | 909 | 1,986 | 1,262 | 1,435 | 1,038 | 1,267 | 1,484 | (6,476) | (5,224) | (4,952)
Provision for income taxes | 60,606 | (30) | (421) | (245) | (102) | (234) | (337) | (147) | (59,910) | 820 | 576
NET INCOME (LOSS) | 56,559 | 4,981 | 2,899 | (152) | 4,496 | 48 | 3,606 | (808) | 64,287 | 7,342 | (12,685)
Net income (loss) attributable to noncontrolling interests | (70) | (72) | (47) | (41) | (51) | 9 | 85 | 68 | (230) | 111 | 167
Net income (loss) attributable to Radnet, Inc. common stockholders | $ 56,629 | $ 5,053 | $ 2,946 | $ (111) | $ 4,547 | $ 39 | $ 3,521 | $ (876) | $ 64,517 | $ 7,231 | $ (12,852)
Basic net income (loss) attributable to Radnet, Inc. common stockholders earnings (loss) per share: | $ 1.47 | $ 0.13 | $ 0.07 | $ 0 | $ 0.12 | $ 0 | $ 0.09 | $ (0.02) | $ 1.71 | $ 0.19 | $ (0.35)
Diluted net income (loss) attributable to Radnet, Inc. common stockholders earnings (loss) per share: | $ 1.42 | $ 0.12 | $ 0.07 | $ 0 | $ 0.12 | $ 0 | $ 0.09 | $ (0.02) | $ 1.64 | $ 0.19 | $ (0.35)
Weighted average shares outstanding |  |  |  |  |  |  |  |  |  |  |
Basic | 38,349,000 | 38,340,000 | 37,761,000 | 37,670,000 | 37,426,000 | 37,426,000 | 37,358,000 | 37,258,000 | 37,751,170 | 37,367,736 | 36,853,477
Diluted | 39,796,000 | 39,861,000 | 39,431,000 | 37,670,000 | 38,059,000 | 38,470,000 | 39,820,000 | 37,258,000 | 39,244,686 | 38,785,675 | 36,853,477

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