Goodwill and Other Intangible Assets (Notes)

3 Months Ended

Mar. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Other Intangible Assets [Text Block]

Goodwill and Other Intangible Assets

The change in the carrying amount of goodwill during the year ended December 31, 2020 and three months ended March 31, 2021 are as follows (in thousands):

	Goodwill Balance
Goodwill at December 31, 2019	$	1,191,259
Acquisitions	46,624
Acquisition fair value adjustment	11
Goodwill at December 31, 2020	1,237,894
Acquisition fair value adjustment	(161)
Goodwill at March 31, 2021	$	1,237,733

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

	March 31, 2021						December 31, 2020
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Other intangible assets:
Contract and program intangible assets	$	430,632	$	247,188	$	183,444	$	430,632	$	242,194	$	188,438
Capitalized software	53,943		42,035		11,908		54,605		40,812		13,793
Total other intangible assets—net	$	484,575	$	289,223	$	195,352	$	485,237	$	283,006	$	202,231

Amortization expense relating to intangible assets for the three months ended March 31, 2021 and 2020 was $6.8 million and $6.5 million, respectively. Amortization expense for the three months ended March 31, 2021 includes an impairment of $0.3 million for capitalized software. 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, 2021	$	18,061
For the year ending:
December 31, 2022	$	23,973
December 31, 2023	$	19,546
December 31, 2024	$	17,486
December 31, 2025	$	15,423
December 31, 2026	$	14,331