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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