Equipment and Improvements (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Equipment and Improvements
Equipment and improvements, Gross Totals	$ 250,336		$ 246,261
Less accumulated depreciation	(164,503)		(155,323)
Foreign currency translation adjustment	(5,153)		3,526
Totals	80,680		94,464
Depreciation
Depreciation expense	10,100	$ 10,500
Decrease in equipment and improvements	1,100	4,600
Decrease in accumulated depreciation	900	$ 4,500
Card Processing
Equipment and Improvements
Equipment and improvements, Gross Totals	140,022		137,190
Office equipment
Equipment and Improvements
Equipment and improvements, Gross Totals	43,019		42,561
Internally developed and acquired software
Equipment and Improvements
Equipment and improvements, Gross Totals	$ 42,581		42,621
Estimated useful lives	3 years
Leasehold improvements
Equipment and Improvements
Equipment and improvements, Gross Totals	$ 18,437		17,870
Furniture and fixtures
Equipment and Improvements
Equipment and improvements, Gross Totals	$ 6,277		$ 6,019
Minimum | Card Processing
Equipment and Improvements
Estimated useful lives	3 years
Minimum | Office equipment
Equipment and Improvements
Estimated useful lives	3 years
Minimum | Furniture and fixtures
Equipment and Improvements
Estimated useful lives	5 years
Maximum | Card Processing
Equipment and Improvements
Estimated useful lives	5 years
Maximum | Office equipment
Equipment and Improvements
Estimated useful lives	5 years
Maximum | Furniture and fixtures
Equipment and Improvements
Estimated useful lives	7 years