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
Jun. 30, 2019
Dec. 31, 2018
Federal Home Loan Bank, Advances, Branch of FHLB Bank [Line Items]    
Federal Home Loan Bank advances $ 50,000 $ 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 $ 50,000 $ 865,000
Weighted average borrowing rate 3.20% 2.79%