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Consolidated Statements of Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Consolidated Statements of Comprehensive Income |  |  |
Revenue | $ 1,162,981 | $ 1,179,388 | $ 1,094,906
Operating expenses |  |  |
Cost of services (exclusive of depreciation and amortization presented separately below) | 834,803 | 848,362 | 789,697
Selling, general and administrative | 182,634 | 188,802 | 165,812
Depreciation and amortization | 41,166 | 44,889 | 50,218
Restructuring charges, net | 22,875 | 3,651 | 13,476
Impairment losses | 2,958 | 230 | 1,958
Total operating expenses | 1,084,436 | 1,085,934 | 1,021,161
Income from operations | 78,545 | 93,454 | 73,745
Other income (expense) |  |  |
Interest income | 2,978 | 3,064 | 2,129
Interest expense | (6,696) | (5,118) | (3,161)
Other income (expense), net | (965) | 154 | 9,256
Total other income (expense) | (4,683) | (1,900) | 8,224
Income before income taxes | 73,862 | 91,554 | 81,969
Benefit from (provision for) income taxes | 61 | (13,279) | (28,431)
Net income | 73,923 | 78,275 | 53,538
Net income attributable to noncontrolling interest | (3,908) | (4,101) | (3,664)
Net income attributable to TeleTech stockholders | 70,015 | 74,174 | 49,874
Other comprehensive income (loss) |  |  |
Foreign currency translation adjustments | 12,648 | (12,596) | 8,080
Derivative valuation, gross | 25,266 | (21,337) | 4,583
Derivative valuation, tax effect | 9,855 | (8,395) | 1,960
Other, net of tax | (527) | 655 | 792
Total other comprehensive income (loss) | 28,586 | (26,193) | 9,911
Total comprehensive income | 102,509 | 52,082 | 63,449
Comprehensive income attributable to noncontrolling interest | 4,039 | 3,716 | 3,754
Comprehensive income attributable to TeleTech stockholders | $ 98,470 | $ 48,366 | $ 59,695
Weighted average shares outstanding |  |  |
Basic | 54,738 | 56,669 | 60,361
Diluted | 55,540 | 57,963 | 61,792
Net income per share attributable to TeleTech stockholders |  |  |
Basic | $ 1.28 | $ 1.31 | $ 0.83
Diluted | $ 1.26 | $ 1.28 | $ 0.81

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