Software and Other Intangible Assets - Summary of Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 529,890	$ 535,097
Accumulated Amortization	(194,193)	(178,128)
Total	335,697	356,969
Software for resale
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	136,618	138,823
Accumulated Amortization	(124,271)	(122,061)
Total	12,347	16,762
Software for internal use
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	415,690	400,065
Accumulated Amortization	(211,750)	(182,310)
Total	203,940	217,755
Software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	552,308	538,888
Accumulated Amortization	(336,021)	(304,371)
Total	216,287	234,517
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	502,748	507,785
Accumulated Amortization	(175,681)	(160,775)
Total	327,067	347,010
Trademarks and tradenames
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,142	27,312
Accumulated Amortization	(18,512)	(17,353)
Total	$ 8,630	$ 9,959