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Repurchase Agreements (Details) - USD ($)
Sep. 30, 2016
Dec. 31, 2015
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount $ 12,525 $ 11,974
U. S. federal agency obligations [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 5,046 5,810
Agency mortgage-backed securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 7,479 6,164
Overnight and Continuous [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 12,525 11,974
Overnight and Continuous [Member] | U. S. federal agency obligations [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 5,046 5,810
Overnight and Continuous [Member] | Agency mortgage-backed securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 7,479 6,164
Maturity Up to 30 Days [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 0 0
Maturity Up to 30 Days [Member] | U. S. federal agency obligations [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 0 0
Maturity Up to 30 Days [Member] | Agency mortgage-backed securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 0 0
Maturity 30 to 90 Days [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 0 0
Maturity 30 to 90 Days [Member] | U. S. federal agency obligations [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 0 0
Maturity 30 to 90 Days [Member] | Agency mortgage-backed securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 0 0
Maturity Greater than 90 Days [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 0 0
Maturity Greater than 90 Days [Member] | U. S. federal agency obligations [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount 0 0
Maturity Greater than 90 Days [Member] | Agency mortgage-backed securities [Member]    
Assets Sold under Agreements to Repurchase [Line Items]    
Assets Sold under Agreements to Repurchase, Carrying Amount $ 0 $ 0