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Leases - Additional Information (Details)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
lease
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
Lessee, Lease, Description [Line Items]      
Accounting Standards Update [Extensible List]   us-gaap:AccountingStandardsUpdate201613Member hope:AccountingStandardsUpdate202006Member
Operating lease right-of-use assets $ 44,179   $ 47,653
Extension options, term of extension 5 years    
Operating lease liabilities $ 48,575   $ 52,030
Short-term operating lease liability 13,400    
Long-term operating lease liability $ 35,200    
Number of leases extended | lease 3    
Number of new leases | lease 0    
Rent expense $ 4,500 $ 4,600  
Minimum      
Lessee, Lease, Description [Line Items]      
Remaining lease term for operating leases 1 year    
Extension options, term of extension 3 years    
Maximum      
Lessee, Lease, Description [Line Items]      
Remaining lease term for operating leases 10 years    
Extension options, term of extension 5 years