Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Additional Information (Detail)

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Commitments and Contingencies - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Commitments and Contingencies Disclosure [Line Items]    
Liability for deferred lease expenses $ 39,235 $ 40,929
Employer matching contribution payments 5,076 $ 6,380
Liability recorded for employer contribution payments $ 1,374  
Other Employees Except Tim Warner    
Commitments and Contingencies Disclosure [Line Items]    
Employment agreements term extension 1 year  
Zoradi    
Commitments and Contingencies Disclosure [Line Items]    
Extended term date of employment agreement Dec. 31, 2019  
Minimum    
Commitments and Contingencies Disclosure [Line Items]    
Non-cancelable leases with terms generally ranging 10 years  
Maximum    
Commitments and Contingencies Disclosure [Line Items]    
Non-cancelable leases with terms generally ranging 25 years