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Business Segments and Geographic Information - Operating and Reporting Segments (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Revenues: |  |  |  |
Revenues | $ 583,530 | $ 566,759 | $ 1,731,956 | $ 1,694,443
Operating Income: |  |  |  |
Operating income | 69,780 | 62,902 | 201,181 | 181,827
U.S. Corrections & Detention |  |  |  |
Revenues: |  |  |  |
Revenues |  |  | 1,107,016 | 1,073,840
GEO Care |  |  |  |
Revenues: |  |  |  |
Revenues |  |  | 431,819 | 377,740
International Services |  |  |  |
Revenues: |  |  |  |
Revenues |  |  | 193,121 | 130,261
Operating Segments |  |  |  |
Revenues: |  |  |  |
Revenues | 583,530 | 566,759 | 1,731,956 | 1,694,443
Operating Income: |  |  |  |
Operating income | 117,427 | 111,976 | 338,108 | 325,693
Operating Segments | U.S. Corrections & Detention |  |  |  |
Revenues: |  |  |  |
Revenues | 379,351 | 365,071 | 1,107,016 | 1,073,840
Operating Income: |  |  |  |
Operating income | 77,885 | 77,551 | 224,386 | 224,838
Operating Segments | GEO Care |  |  |  |
Revenues: |  |  |  |
Revenues | 141,808 | 134,610 | 431,819 | 377,740
Operating Income: |  |  |  |
Operating income | 35,959 | 31,293 | 102,795 | 94,062
Operating Segments | International Services |  |  |  |
Revenues: |  |  |  |
Revenues | 62,371 | 45,641 | 193,121 | 130,261
Operating Income: |  |  |  |
Operating income | 3,583 | 3,410 | 10,927 | 8,413
Operating Segments | Facility Construction and Design |  |  |  |
Revenues: |  |  |  |
Revenues | 0 | 21,437 | 0 | 112,602
Operating Income: |  |  |  |
Operating income | $ 0 | $ (278) | $ 0 | $ (1,620)

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