Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2021 USD ($) Customer shares	Dec. 31, 2020 USD ($) Customer shares	Dec. 31, 2019 USD ($) shares	Jan. 01, 2019 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Repurchases of shares, value	$ 62,096,000	$ 98,274,000	$ 0
Sales rebates	7,200,000	4,800,000	6,200,000
Performance obligations remaining to be performed	$ 2,100,000,000	$ 1,600,000,000
Number of customers accounted for more than 10% of accounts receivable | Customer	0	0
Fair value measurements transfers between level 1, level 2, or level 3	$ 0	$ 0	$ 0
Accumulated deficit	234,984,000	115,229,000		$ (32,334,000)
Accounts receivable and unbilled, net	186,432,000	160,962,000
Deferred income tax liability	1,080,000	13,551,000		$ 3,158,000
Accrued expenses	159,286,000	134,367,000
Advanced billings	$ 344,641,000	$ 255,664,000
Maximum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	15 years
Maximum | Computer Hardware Software Phone and Medical Imaging Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets	5 years
Maximum | Furniture and Fixtures and Other Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets	7 years
Maximum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets	40 years
Maximum | Computer Software Developed Costs
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets	3 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of intangible assets	5 years
Minimum | Computer Hardware Software Phone and Medical Imaging Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets	3 years
Minimum | Furniture and Fixtures and Other Equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets	5 years
Minimum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life of assets	30 years
Stock Options
Summary Of Significant Accounting Policies [Line Items]
Anti-dilutive securities excluded from computation of diluted EPS | shares	9,000	204,000	248,000
Miscellaneous Income (Expense), Net
Summary Of Significant Accounting Policies [Line Items]
Net gain/(loss) on foreign currency transactions	$ 2,800,000	$ 500,000	$ (600,000)
Selling, General and Administrative
Summary Of Significant Accounting Policies [Line Items]
Advertisement expenses	$ 1,200,000	$ 700,000	$ 700,000
Share Repurchase Program
Summary Of Significant Accounting Policies [Line Items]
Repurchases of shares | shares	377,783	1,183,095
Repurchases of shares, value	$ 62,100,000	$ 98,300,000
Remaining amount of repurchase program	$ 190,500,000