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Business Segments and Geographic Information - Operating and Reporting Segments (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Operating Income: |  |
Operating income | $ 64,450 | $ 64,372
Operating Segments |  |
Revenues: |  |
Revenues | 564,917 | 550,614
Operating Income: |  |
Operating income | 106,282 | 106,958
Operating Segments | U.S. Corrections & Detention |  |
Revenues: |  |
Revenues | 358,681 | 347,931
Operating Income: |  |
Operating income | 69,188 | 74,896
Operating Segments | GEO Care |  |
Revenues: |  |
Revenues | 140,078 | 103,766
Operating Income: |  |
Operating income | 31,692 | 28,826
Operating Segments | International Services |  |
Revenues: |  |
Revenues | 66,158 | 41,692
Operating Income: |  |
Operating income | 5,402 | 2,886
Operating Segments | Facility Construction and Design |  |
Revenues: |  |
Revenues | 0 | 57,225
Operating Income: |  |
Operating income | $ 0 | $ 350

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