Quarterly report pursuant to Section 13 or 15(d)

Federal Home Loan Bank of Des Moines Advances (Details)

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Federal Home Loan Bank of Des Moines Advances (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Federal Home Loan Bank advances $ 865,024 $ 865,024
Maximum percent of FHLB advances to total assets 40.00%  
Federal Home Loan Bank of Des Moines [Member]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Federal Home Loan Bank advances $ 865,000 $ 865,000
Weighted average borrowing rate 2.80% 2.79%
Available uncommitted capacity for borrowings $ 3,100,000 $ 3,100,000