Business Combinations - Additional Information (Details) - USD ($) $ in Thousands			1 Months Ended	12 Months Ended
	Jul. 13, 2022	Nov. 01, 2021	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Sep. 01, 2022	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill			$ 1,046,760	$ 1,212,898	$ 1,046,760	$ 909,913		$ 1,046,760
Revenue				1,779,964	1,553,048	$ 1,506,875
Business Acquisition and Integration Related Costs				4,300
Blanton & Associates
Business Acquisition [Line Items]
Working capital acquired							$ 4,600
Purchase price allocated to property and equipment							200
Deferred income tax liabilities							3,000
Goodwill							9,700
Goodwill resulting from business combination				9,712
Purchase price allocated to intangibles							11,400
Goodwill, Purchase Accounting Adjustments				9,712
Blanton & Associates | Customer Relationships
Business Acquisition [Line Items]
Purchase price allocated to intangibles							10,900
Blanton & Associates | Trade Names and Trademarks
Business Acquisition [Line Items]
Purchase price allocated to intangibles							100
Blanton & Associates | Contract Backlog
Business Acquisition [Line Items]
Purchase price allocated to intangibles							$ 500
SemanticBits LLC
Business Acquisition [Line Items]
Purchase price acquisition	$ 215,998
Deferred income tax liabilities	16,701
Goodwill	159,700
Goodwill resulting from business combination				159,677
Initial cash purchase price	220,000
Revenue				64,300
Gross Profit				26,700
Goodwill, Purchase Accounting Adjustments				159,677
SemanticBits LLC | Customer Relationships
Business Acquisition [Line Items]
Purchase price allocated to intangibles	$ 63,000
Weighted average amortization period for intangibles	4 years
SemanticBits LLC | Trade Names and Trademarks
Business Acquisition [Line Items]
Purchase price allocated to intangibles	$ 1,120
Weighted average amortization period for intangibles	8 months 12 days
Creative Systems
Business Acquisition [Line Items]
Business acquisition date			Dec. 31, 2021
Purchase price acquisition			$ 156,600
Goodwill resulting from business combination			128,100
Initial cash purchase price			159,500
Working capital adjustments			2,900
Goodwill, Purchase Accounting Adjustments			128,100
Creative Systems | Customer Relationships
Business Acquisition [Line Items]
Purchase price allocated to intangibles			$ 24,500		24,500
Amortization Period of intangible assets			4 years
Creative Systems | Intangible Assets
Business Acquisition [Line Items]
Purchase price allocated to intangibles			$ 28,900		28,900
Creative Systems | Developed Technology
Business Acquisition [Line Items]
Purchase price allocated to intangibles			$ 3,700		3,700
Amortization Period of intangible assets			10 years
Creative Systems | Trade Names and Trademarks
Business Acquisition [Line Items]
Purchase price allocated to intangibles			$ 600		600
Creative Systems | Non-compete Agreements
Business Acquisition [Line Items]
Purchase price allocated to intangibles			$ 100		100
Creative Systems | Non-compete Agreements | Maximum
Business Acquisition [Line Items]
Amortization Period of intangible assets			1 year
ESAC
Business Acquisition [Line Items]
Working capital acquired		$ 2,600
Goodwill		11,300
Goodwill resulting from business combination				87	11,226
Initial cash purchase price		17,300
Goodwill, Purchase Accounting Adjustments				$ 87	$ 11,226
ESAC | Customer Relationships
Business Acquisition [Line Items]
Purchase price allocated to intangibles		$ 3,100
Amortization Period of intangible assets		3 years
ESAC | Technology and other intangibles
Business Acquisition [Line Items]
Purchase price allocated to intangibles		$ 300
Amortization Period of intangible assets		1 year
ESAC | Intangible Assets
Business Acquisition [Line Items]
Purchase price allocated to intangibles		$ 3,400