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QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenue | $ 100,841 | $ 94,558 | $ 94,290 | $ 94,713 | $ 78,341 | $ 69,804 | $ 55,136 | $ 50,935 | $ 384,402 | $ 254,216 | $ 167,350
Operating income (loss) | 13,402 | 14,150 | 12,715 | 11,845 | 8,248 | 7,773 | 6,775 | 5,718 | 52,112 | 28,514 | (969)
Income (loss) from continuing operations | 8,021 | 7,280 | 9,002 | 6,905 | 32,081 | 7,383 | 6,439 | 5,413 | 31,208 | 51,316 | (487)
Income (loss) from discontinued operations | (697) | (664) | (1,150) | (1,203) | (31) | (1,295) | (1,717) | (226) | (3,714) | (3,269) | 9,849
Net income (loss) and comprehensive income (loss) | $ 7,324 | $ 6,616 | $ 7,852 | $ 5,702 | $ 32,050 | $ 6,088 | $ 4,722 | $ 5,187 | $ 27,494 | $ 48,047 | $ 9,362
Basic (in dollars per share) | $ 0.68 | $ 0.62 | $ 0.76 | $ 0.58 | $ 2.69 | $ 0.65 | $ 0.57 | $ 0.48 | $ 2.64 | $ 4.46 | $ (0.04)
Diluted (in dollars per share) | 0.63 | 0.57 | 0.71 | 0.54 | 2.47 | 0.59 | 0.52 | 0.44 | 2.44 | 4.09 | (0.04)
Income (loss) per share from discontinued operations: |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | (0.06) | (0.06) | (0.10) | (0.10) | 0.00 | (0.11) | (0.15) | (0.02) |  |  |
Diluted (in dollars per share) | (0.05) | (0.05) | (0.09) | (0.09) | 0.00 | (0.10) | (0.14) | (0.02) |  |  |
Income (loss) per share from continuing operations: |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | 0.62 | 0.56 | 0.67 | 0.48 | 2.69 | 0.53 | 0.41 | 0.46 | 2.33 | 4.17 | 0.84
Diluted (in dollars per share) | $ 0.57 | $ 0.52 | $ 0.62 | $ 0.44 | $ 2.47 | $ 0.49 | $ 0.38 | $ 0.43 | $ 2.15 | $ 3.83 | $ 0.84

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