Intangible Assets and Goodwill - Intangibles (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Intangibles
Gross Carrying Amount	$ 704,115	$ 701,065
Accumulated Amortization	(530,184)	(500,083)
Intangible Asset, net	173,931	200,982
Carrying amount of indefinite-lived trade names which are not amortizable	5,300
Customer relationships
Intangibles
Gross Carrying Amount	507,675	507,723
Accumulated Amortization	(373,656)	(351,240)
Intangible Asset, net	134,019	156,483
Developed technology
Intangibles
Gross Carrying Amount	88,553	88,553
Accumulated Amortization	(88,026)	(88,000)
Intangible Asset, net	527	553
Patent
Intangibles
Gross Carrying Amount	15	15
Accumulated Amortization	(14)	(6)
Intangible Asset, net	1	9
Trade names
Intangibles
Gross Carrying Amount	8,400	8,400
Accumulated Amortization	(3,100)	(3,100)
Intangible Asset, net	5,300	5,300
Accumulated impairment losses	44,100	44,100
Outsource contract costs
Intangibles
Gross Carrying Amount	17,616	17,184
Accumulated Amortization	(16,131)	(15,509)
Intangible Asset, net	1,485	1,675
Internally developed software
Intangibles
Gross Carrying Amount	55,107	52,441
Accumulated Amortization	(40,786)	(35,095)
Intangible Asset, net	14,321	17,346
Purchased software
Intangibles
Gross Carrying Amount	26,749	26,749
Accumulated Amortization	(8,471)	(7,133)
Intangible Asset, net	$ 18,278	$ 19,616

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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