SEGMENT INFORMATION - Revenues, Operating Income, and Assets (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenues	$ 145,177	$ 134,569	$ 129,706	$ 123,775	$ 119,502	$ 120,330	$ 118,682	$ 111,001	$ 533,227	$ 469,515	$ 974,948
Costs and expenses
Cost of revenues									112,386	94,437	638,545
Operating expenses									162,184	142,298	118,935
Research and development									32,505	20,497	18,862
Depreciation									63,198	61,225	47,282
Amortization									68,937	65,245	69,505
Total costs and expenses									439,210	383,702	893,129
Operating income	15,973	$ 27,293	$ 24,879	$ 25,872	17,215	$ 21,510	$ 22,597	$ 24,491	94,017	85,813	81,819
Total assets	1,629,223				1,548,261				1,629,223	1,548,261
Games
Segment Reporting Information [Line Items]
Total revenues									283,119	258,978	222,777
Costs and expenses
Cost of revenues									71,894	68,009	54,695
Operating expenses									61,522	57,244	42,780
Research and development									24,954	20,497	18,862
Depreciation									56,882	55,058	40,428
Amortization									57,491	55,099	57,060
Total costs and expenses									272,743	255,907	213,825
Operating income									10,376	3,071	8,952
Total assets	902,888				912,849				902,888	912,849
FinTech
Segment Reporting Information [Line Items]
Total revenues									250,108	210,537	752,171
Costs and expenses
Cost of revenues									40,492	26,428	583,850
Operating expenses									100,662	85,054	76,155
Research and development									7,551	0	0
Depreciation									6,316	6,167	6,854
Amortization									11,446	10,146	12,445
Total costs and expenses									166,467	127,795	679,304
Operating income									83,641	82,742	72,867
Total assets	$ 726,335				$ 635,412				726,335	635,412
Gaming operations | Games
Segment Reporting Information [Line Items]
Total revenues									188,874	168,146	148,654
Costs and expenses
Cost of revenues									18,043	17,603	15,741
Gaming equipment and systems | Games
Segment Reporting Information [Line Items]
Total revenues									90,919	87,038	70,118
Costs and expenses
Cost of revenues									50,826	47,121	35,707
Gaming other | Games
Segment Reporting Information [Line Items]
Total revenues									3,326	3,794	4,005
Costs and expenses
Cost of revenues									3,025	3,285	3,247
Cash access services | FinTech
Segment Reporting Information [Line Items]
Total revenues									164,741	156,806	707,222
Costs and expenses
Cost of revenues									14,236	9,717	572,880
Equipment | FinTech
Segment Reporting Information [Line Items]
Total revenues									37,865	20,977	13,258
Costs and expenses
Cost of revenues									22,292	12,601	7,717
Information services and other | FinTech
Segment Reporting Information [Line Items]
Total revenues									47,502	32,754	31,691
Costs and expenses
Cost of revenues									$ 3,964	$ 4,110	$ 3,253