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Accounting Policies - Concentration of Credit and Customer Risk (Details) - agency | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items] |  |  |
Number of government agencies | 3 |  |
Sales Revenue, Net | Customer Concentration Risk | Foreign Customers |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Concentration risk percentage | 36.60% | 35.80% | 33.50%
Sales Revenue, Net | Customer Concentration Risk | Government Agencies |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Concentration risk percentage | 32.20% | 29.10% | 26.10%
Sales Revenue, Net | Customer Concentration Risk | Federal Government Agencies |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Concentration risk percentage | 4.00% | 4.20% | 4.50%
Accounts Receivable | Customer Concentration Risk | Customer One |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Concentration risk percentage | 17.50% |  |

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