XML 61 R48.htm IDEA: XBRL DOCUMENT v3.21.1
Nature of Operations and Basis of Presentation - Additional Information (Detail) - Federal funds rate [Member]
Mar. 03, 2020
Mar. 16, 2020
Increase decrease in interest rate 50.00%  
Maximum [Member]    
Debt instrument interest rate   0.25%
Minimum [Member]    
Debt instrument interest rate 1.00% 0.00%