Transactions with Other FHLBanks (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Schedule of Other Transactions [Line Items]
Proceeds from Bonds Transferred from Other Federal Home Loan Banks	$ 0	$ 0
Payments for Bonds Transferred to Other Federal Home Loan Banks	0	0
Other FHLBanks [Member]
Schedule of Other Transactions [Line Items]
Loans Receivable, Average Outstanding Amount	28	0
Other FHLBanks [Member]
Schedule of Other Transactions [Line Items]
Short-term Debt, Average Outstanding Amount	$ 1,381	$ 0