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CONSOLIDATED SUPPLEMENTARY FINANCIAL DATA (Unaudited) (Details) (USD $) In Thousands, except Per 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
Revenue: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total revenue | $ 57,443 | [1] | $ 57,530 | [1] | $ 56,215 |  | $ 62,863 |  | $ 83,359 |  | $ 100,263 |  | $ 66,214 |  | $ 62,527 |  | $ 234,051 | $ 312,363 | $ 323,390
Operating costs and expenses: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total operating costs and expenses | 61,470 | [1],[2] | 104,630 | [1],[2] | 77,964 | [2] | 80,421 | [2] | 101,493 | [2] | 89,527 | [2] | 68,722 | [2] | 54,157 | [2] | 324,485 | 313,899 | 96,508
Operating income (loss) | (4,027) | [1] | (47,100) | [1] | (21,749) |  | (17,558) |  | (18,134) |  | 10,736 |  | (2,508) |  | 8,370 |  | (90,434) | (1,536) | 226,882
Net income (loss) | $ (16,132) | [1] | $ (58,098) | [1] | $ (32,216) |  | $ (27,890) |  | $ (28,716) |  | $ 478 |  | $ (10,585) |  | $ (4,230) |  | $ (134,336) | $ (43,053) | $ 150,917
Net income (loss) per share: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) per share - basic (in dollars per share) | $ (0.14) | [1] | $ (0.52) | [1] | $ (0.29) |  | $ (0.25) |  | $ (0.26) |  | $ 0.00 |  | $ (0.10) |  | $ (0.04) |  | $ (1.21) | $ (0.39) | $ 1.34
Net income (loss) per share - diluted (in dollars per share) | $ (0.14) | [1] | $ (0.52) | [1] | $ (0.29) |  | $ (0.25) |  | $ (0.26) |  | $ 0.00 |  | $ (0.10) |  | $ (0.04) |  | $ (1.21) | $ (0.39) | $ 1.30
Shares used in per share calculations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Basic (in shares) | 111,332 | [1] | 110,826 | [1] | 110,553 |  | 110,358 |  | 110,171 |  | 112,334 |  | 109,992 |  | 107,613 |  | 110,769 | 110,041 | 112,456
Diluted (in shares) | 111,332 | [1] | 110,826 | [1] | 110,553 |  | 110,358 |  | 110,171 |  | 115,552 |  | 109,992 |  | 107,613 |  | 110,769 | 110,041 | 115,884
[1] | The quarterly financial information includes $6.6 million related to restructuring charges in the quarter ended September 30, 2012 and$0.7 million related to restructuring charges in the quarter ended December 31, 2012. Refer to Note 16, "Restructuring Charges" of Notes to Consolidated Financial Statements of this Form 10-K.
[2] | The quarterly financial information includes $35.5 million related to the impairment of goodwill and long-lived assets in the quarter ended September 30, 2012. Refer to Note 6, "Intangible Assets and Goodwill" of Notes to Consolidated Financial Statements of this Form 10-K.

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