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Stock-Based Compensation (Summary of Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated stock-based compensation expense | $ 110,294 | $ 120,379 | $ 87,257
Cost of recurring [Member] |  |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated stock-based compensation expense | 11,258 | 12,405 | 5,793
Cost of one-time services and other [Member] |  |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated stock-based compensation expense | 3,178 | 7,547 | 7,581
Total included in cost of revenue [Member] |  |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated stock-based compensation expense | 14,436 | 19,952 | 13,374
Sales, marketing and customer success [Member] |  |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated stock-based compensation expense | 21,409 | 20,283 | 15,514
Research and development [Member] |  |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated stock-based compensation expense | 24,207 | 27,080 | 18,527
General and administrative [Member] |  |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated stock-based compensation expense | 50,242 | 53,064 | 39,842
Total included in operating expenses [Member] |  |  |
Employee Service Stock-based Compensation, Allocation of Recognized Period Costs [Line Items] |  |  |
Allocated stock-based compensation expense | $ 95,858 | $ 100,427 | $ 73,883

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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