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Business Segments and Geographic Information - Operating and Reporting Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Operating Income: |  |  |  |
Operating income | $ 66,951 | $ 54,553 | $ 131,401 | $ 118,925
Operating Segments |  |  |  |
Revenues: |  |  |  |
Revenues | 583,509 | 577,070 | 1,148,426 | 1,127,684
Operating Income: |  |  |  |
Operating income | 114,399 | 106,759 | 220,681 | 213,717
Operating Segments | U.S. Corrections & Detention |  |  |  |
Revenues: |  |  |  |
Revenues | 368,989 | 360,838 | 727,670 | 708,769
Operating Income: |  |  |  |
Operating income | 77,318 | 69,801 | 146,506 | 144,697
Operating Segments | GEO Care |  |  |  |
Revenues: |  |  |  |
Revenues | 149,928 | 139,364 | 290,006 | 243,130
Operating Income: |  |  |  |
Operating income | 35,139 | 36,533 | 66,831 | 65,359
Operating Segments | International Services |  |  |  |
Revenues: |  |  |  |
Revenues | 64,592 | 42,928 | 130,750 | 84,620
Operating Income: |  |  |  |
Operating income | 1,942 | 2,117 | 7,344 | 5,003
Operating Segments | Facility Construction and Design |  |  |  |
Revenues: |  |  |  |
Revenues | 0 | 33,940 | 0 | 91,165
Operating Income: |  |  |  |
Operating income | $ 0 | $ (1,692) | $ 0 | $ (1,342)

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