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Leases - Additional Information (Detail)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
USD ($)
Lease
Facility
Mar. 31, 2019
USD ($)
Lessee Lease Description [Line Items]    
Operating leases expiration date 2028  
Number of subleases | Lease 6  
Number of facilities leased | Facility 5  
Sublease Income [1] $ 788 $ 1,108
Asset impairment $ 612  
Minimum [Member]    
Lessee Lease Description [Line Items]    
Lease term range, years 5 years  
Number of renewal options for extended terms 1 year  
Operating sublease term 1 year  
Maximum [Member]    
Lessee Lease Description [Line Items]    
Lease term range, years 10 years  
Number of renewal options for extended terms 4 years  
Operating sublease term 3 years  
[1] Lease expense and sublease income represent the amount recorded within our unaudited condensed consolidated statements of income and comprehensive income. Variable lease amounts represent expenses recognized as incurred which are not included in the lease liability. Fixed lease expenses and sublease income are recorded on a straight-line basis over the lease term and therefore are not necessarily representative of cash payments during the same period.