XML 116 R99.htm IDEA: XBRL DOCUMENT v3.22.0.1
Earnings Per Share - Additional Information (Detail)
Jun. 04, 2021
USD ($)
Director
shares
Oct. 01, 2021
USD ($)
shares
Nov. 20, 2020
shares
Jun. 05, 2020
USD ($)
shares
Earnings Per Share Basic [Line Items]        
Compensation annual basis committee award | $ $ 6,000     $ 4,000
Number of directors received shares | shares 272   20 176
Number of directors received shares | Director 10      
Number of directors received prorated dollar value of shares | Director 4      
Perpetual Federal Savings Bank {Member]        
Earnings Per Share Basic [Line Items]        
Compensation annual basis committee award | $   $ 1,523    
Number of directors received shares | shares   68