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Advances From Federal Home Loan Bank (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Advances from Federal Home Loan Banks $ 0 $ 0
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged 1,190,000,000 1,630,000,000
Long-term Line of Credit 0  
Investment securities specifically pledged as collateral 0 $ 0
Federal Home Loan Bank of Des Moines [Member]    
Long-term Line of Credit $ 756,500,000