Pledged Assets - Assets Pledged By Counterprties (Details) - Repurchase Agreement [Member] - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Pledged Assets [Line Items]
Mortgage Backed Securities Pledged From Counterparties	$ 0	$ 167,000
United States Treasury Securities Pledged By Counterparties	3,438,000	723,000
Cash Pledged By Counterparties	1,029,000	1,421,000
Total Assets Pledged By Counterparties	$ 4,467,000	$ 2,311,000