XML 126 R73.htm IDEA: XBRL DOCUMENT v3.21.1
Cash and Cash Equivalents - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Disclosure of cash and cash equivalents [line items]    
Collateral pledged $ 5.9 $ 0.0
Bottom of range [member]    
Disclosure of cash and cash equivalents [line items]    
Time deposits interest rate 0.24% 1.71%
Top of range [member]    
Disclosure of cash and cash equivalents [line items]    
Time deposits interest rate 0.35% 1.98%