XML 50 R127.htm IDEA: XBRL DOCUMENT v3.20.1
Right of Use Assets - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about Right-of-use assets [Line Items]    
Additions to the right of use assets $ 473  
Cash outflow for lease $ 691  
Long-term operating lease duration   50 years
Bottom of range [Member]    
Disclosure of detailed information about Right-of-use assets [Line Items]    
Lease term of contract 1 year  
Top Of Range [Member]    
Disclosure of detailed information about Right-of-use assets [Line Items]    
Lease term of contract 36 years