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Indebtedness - Additional Information (Detail)
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 26, 2017
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2015
Building
Jun. 18, 2015
USD ($)
Term Loan B          
Debt Instrument [Line Items]          
Loan facility principal amount $ 545,000,000        
Term Loan B2 Facility          
Debt Instrument [Line Items]          
Term B loan maturity date Apr. 30, 2024        
Capitalized financing fees $ 100,000        
Original issuance discount 1,400,000        
Expensed Amount of debt discount costs 2,500,000        
Write off amount of debt discount costs $ 300,000        
San Diego Office Complex          
Debt Instrument [Line Items]          
Number of building in sale and leaseback arrangement | Building       2  
Lease, increase to financing obligation     $ 4,000,000    
Lease, increase in building asset     $ 4,000,000    
San Diego Office Complex | Building One          
Debt Instrument [Line Items]          
Leasing back term       10 years  
Leasing back term, description     Building 1 did not qualify for sale-leaseback accounting due to continuing involvement that will exist for the 10-year lease term. Accordingly, the carrying value of Building 1 will remain on the Company's balance sheet and will be depreciated over the ten-year lease period with the proceeds reflected as a financing obligation.    
Minimum | Term Loan B2 Facility | LIBOR          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate 2.25%        
Minimum | Term Loan B2 Facility | Prime Rate          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate 1.25%        
Maximum | Term Loan B2 Facility | LIBOR          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate 2.50%        
Maximum | Term Loan B2 Facility | Prime Rate          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate 1.50%        
Senior Secured Credit Facilities          
Debt Instrument [Line Items]          
Mandatory repayments related to senior secured credit facilities   $ 23,700,000 $ 46,100,000    
Senior Secured Credit Facilities | Term Loan A          
Debt Instrument [Line Items]          
Line of credit facility         $ 990,000,000
Senior Secured Credit Facilities | Term Loan A | LIBOR          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate     1.75%    
Senior Secured Credit Facilities | Term Loan B          
Debt Instrument [Line Items]          
Line of credit facility         543,800,000
Senior Secured Credit Facilities | Revolving Facility          
Debt Instrument [Line Items]          
Line of credit facility         500,000,000
Senior Secured Credit Facilities | Revolving Facility | LIBOR          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate [1]     1.75%    
Senior Secured Credit Facilities | Term Loan A-1 Facility          
Debt Instrument [Line Items]          
Line of credit facility         $ 800,000,000
Senior Secured Credit Facilities | Term Loan A-1 Facility | LIBOR          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate     1.75%    
Senior Secured Credit Facilities | Term Loan B2 Facility | LIBOR          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate     2.50%    
Senior Secured Credit Facilities | Minimum          
Debt Instrument [Line Items]          
Consolidated interest leverage ratio   350.00% 350.00%    
Senior Secured Credit Facilities | Maximum          
Debt Instrument [Line Items]          
Consolidated net leverage ratio   350.00% 350.00%    
[1] Includes unused commitment fee of 0.35% and letter of credit fee of 1.75% not reflected in interest rate above.