Software and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Carrying Amount and Accumulated Amortization of Software and Other Intangible Assets

The carrying amount and accumulated amortization of the Company's software assets subject to amortization at each balance sheet date are as follows (in thousands):

	September 30, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Net Balance		Gross Carrying Amount		Accumulated Amortization		Net Balance
Software for resale	$	138,017	$	(127,535)	$	10,482	$	138,823	$	(122,061)	$	16,762
Software for internal use	424,054		(230,297)		193,757		400,065		(182,310)		217,755
Total software	$	562,071	$	(357,832)	$	204,239	$	538,888	$	(304,371)	$	234,517

The carrying amount and accumulated amortization of the Company’s other intangible assets subject to amortization at each balance sheet date are as follows (in thousands):

	September 30, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Net Balance		Gross Carrying Amount		Accumulated Amortization		Net Balance
Customer relationships	$	506,270	$	(185,981)	$	320,289	$	507,785	$	(160,775)	$	347,010
Trademarks and trade names	27,385		(19,417)		7,968		27,312		(17,353)		9,959
Total other intangible assets	$	533,655	$	(205,398)	$	328,257	$	535,097	$	(178,128)	$	356,969

Schedule of Estimated Intangible Asset Amortization Expense in Future Fiscal Years

Based on capitalized intangible assets as of September 30, 2020, estimated amortization expense amounts in future fiscal years are as follows (in thousands):

Fiscal Year Ending December 31,	Software Amortization		Other Intangible Assets Amortization
Remainder of 2020	$	18,476	$	9,199
2021	64,445		36,632
2022	45,825		36,483
2023	29,267		36,168
2024	20,160		31,713
Thereafter	26,066		178,062
Total	$	204,239	$	328,257