Federal Home Loan Bank Stock (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2017 USD ($) item	Dec. 31, 2016 USD ($)
Federal Home Loan Bank Stock [Abstract]
Active market for Federal Home Loan Bank Stock | item	0
Total FHLB stock	$ 2,276	$ 3,216
Other-than-temporary impairment related to the carrying amount of FHLB stock	$ 0