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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Oct. 10, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity method ownership percentage in joint venture |  |  | 49.00%
Cash Payments Received On Divestiture Of MedData | $ 249.7 |  |
Equity consideration in the parent company of Buyer | $ 50.0 |  |
Cash and cash equivalents maturity description |  | 90 |
Additional amounts to be paid in cash or common stock based on achievement of performance measures within period, maximum years |  | 5 years |
Accumulated Non cash impairment charge of goodwill |  | $ 1,450.0 |
Unnamed Corporate Joint Venture One [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity method ownership percentage in joint venture |  | 37.50% |
Unnamed Corporate Joint Venture Two [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Equity method ownership percentage in joint venture |  | 49.00% |
Government Contracts Concentration Risk [Member] | Accounts Receivable [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Percentage of net accounts receivable |  | 20.00% | 19.00%
Buildings [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 30 years |
Maximum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Short-Term investments maturity period, in years |  | 1 year |
Intangible assets finite lives |  | 20 years |
Maximum [Member] | Medical Equipment [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 7 years |
Maximum [Member] | Computer Equipment [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 7 years |
Maximum [Member] | Software and Software Development Costs [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 7 years |
Maximum [Member] | Furniture [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 7 years |
Minimum [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Intangible assets finite lives |  | 1 year |
Minimum [Member] | Medical Equipment [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 3 years |
Minimum [Member] | Computer Equipment [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 3 years |
Minimum [Member] | Software and Software Development Costs [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 3 years |
Minimum [Member] | Furniture [Member] |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |
Property and equipment estimated useful lives, years |  | 3 years |

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