Cash and cash equivalents concentrations	12 Months Ended
	Dec. 31, 2021
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents concentrations	Cash and cash equivalents concentrations:Prior to March 26, 2020, the Bank was required to maintain an average reserve balance with the Federal Reserve Bank or maintain such reserve balance in the form of cash. To push liquidity into the system at the beginning of the COVID-19 health pandemic, the Board of Governors of the Federal Reserve System reduced reserve requirement ratios on all net transaction accounts to zero percent, eliminating reserve requirements for all depository institutions. Therefore, the Bank's required average reserve balance was $0 as of December 31, 2021 and 2020. The Bank maintains its cash in bank deposit accounts, which, at times, may exceed federally insured limits. The Bank has not experienced any losses in such correspondent accounts and believes it is not exposed to any significant credit risk from cash and cash equivalents. Included in cash and cash equivalents, the Bank had cash in the form of Federal funds sold of $53,919 and $121,153 as of December 31, 2021 and 2020, respectively; and the Bank had reverse repurchase agreements of $74,168 and $0 as of December 31, 2021 and 2020, respectively.