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Software and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2021
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):
December 31, 2021December 31, 2020
Gross Carrying
Amount
Accumulated
Amortization
Net
Balance
Gross Carrying
Amount
Accumulated
Amortization
Net
Balance
Software for internal use$440,242 $(283,109)$157,133 $430,330 $(240,717)$189,613 
Software for resale127,904 (127,255)649 130,261 (123,418)6,843 
Total software
$568,146 $(410,364)$157,782 $560,591 $(364,135)$196,456 
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):
December 31, 2021December 31, 2020
Gross Carrying
Amount
Accumulated
Amortization
Net
Balance
Gross Carrying
Amount
Accumulated
Amortization
Net
Balance
Customer relationships
$507,962 $(230,152)$277,810 $512,389 $(197,787)$314,602 
Trademarks and trade names
23,839 (18,645)5,194 24,115 (16,734)7,381 
Total other intangible assets
$531,801 $(248,797)$283,004 $536,504 $(214,521)$321,983 
Summary of Estimated Intangible Asset Amortization Expense in Future Fiscal Years
Based on capitalized intangible assets as of December 31, 2021, estimated amortization expense amounts in future fiscal years are as follows (in thousands):
Fiscal Year Ending December 31,Software
Amortization		Other Intangible
Assets Amortization
2022$61,357 $36,639 
202342,647 36,320 
202426,081 31,811 
202519,852 23,237 
20267,789 23,237 
Thereafter
56 131,760 
Total
$157,782 $283,004