Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

The change in the carrying amount of goodwill during the year ended December 31, 2019 and nine months ended September 30, 2020 are as follows (in thousands):



	Goodwill Balance
Goodwill at December 31, 2018	$	1,085,806
Acquisitions	105,453
Goodwill at December 31, 2019	1,191,259
Acquisition fair value adjustment	11
Goodwill at September 30, 2020	$	1,191,270

Schedule of Other Intangible Assets [Table Text Block]

Other intangible assets consisted of the following (in thousands):



	September 30, 2020						December 31, 2019
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Other intangible assets:
Contract and program intangible assets	$	402,532	$	237,101	$	165,431	$	402,532	$	221,437	$	181,095
Capitalized software	56,157		40,988		15,169		52,411		36,728		15,683
Total other intangible assets—net	$	458,689	$	278,089	$	180,600	$	454,943	$	258,165	$	196,778

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 three months ending December 31, 2020	$	6,377
For the year ending:
December 31, 2021	$	23,880
December 31, 2022	$	21,254
December 31, 2023	$	17,640
December 31, 2024	$	15,567
December 31, 2025	$	13,626