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RESTRICTIONS ON CASH AND DUE FROM BANKS:
12 Months Ended
Dec. 31, 2021
Restrictions On Cash and Due From Banks Disclosure [Abstract]  
RESTRICTIONS ON CASH AND DUE FROM BANKS RESTRICTIONS ON CASH AND DUE FROM BANKS:
 
Certain affiliate banks are required to maintain average reserve balances with the Federal Reserve Bank. The amount of those reserve balances was zero at December 31, 2021 and 2020.