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Goodwill and Other Intangible Assets (Tables)
 3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill [Table Text Block]
The change in the carrying amount of goodwill during the year ended December 31, 2021 and three months ended March 31, 2022 are as follows (in thousands):
Goodwill Balance
Goodwill at December 31, 2020$1,237,894 
Acquisitions260,863 
Acquisition fair value adjustment231 
Goodwill at December 31, 20211,498,988 
Acquisition fair value adjustment10,271 
Goodwill at March 31, 2022$1,509,259 
Schedule of Other Intangible Assets [Table Text Block]
Other intangible assets consisted of the following (in thousands):

March 31, 2022December 31, 2021
Gross Carrying AmountAccumulated AmortizationNet Carrying AmountGross Carrying AmountAccumulated AmortizationNet Carrying Amount
Other intangible assets:
Contract and program intangible assets$512,032 $269,051 $242,981 $517,932 $262,105 $255,827 
Capitalized software57,915 48,552 9,363 56,938 47,210 9,728 
Total other intangible assets—net$569,947 $317,603 $252,344 $574,870 $309,315 $265,555 
Schedule of Other Intangible Assets, Future Amortization Expense [Table Text Block] We estimate that we will have the following amortization expense for the future periods indicated below (in thousands):
For the remaining nine months ending December 31, 2022$23,985 
For the year ending:
December 31, 2023$25,548 
December 31, 2024$23,182 
December 31, 2025$20,549 
December 31, 2026$19,340 
December 31, 2027$18,312