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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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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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