Repurchase Agreements (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	$ 20,907	$ 18,062
Total liability recognized for repurchase agreements	15,061	14,989
U.S. Agency Securities [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	20,907	18,062
Overnight and Continuous [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	18,909	16,027
Overnight and Continuous [Member] | U.S. Agency Securities [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	18,909	16,027
Up to 30 Days [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	0	0
Up to 30 Days [Member] | U.S. Agency Securities [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	0	0
30 - 90 Days [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	0	0
30 - 90 Days [Member] | U.S. Agency Securities [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	0	0
Greater than 90 Days [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	1,998	2,035
Greater than 90 Days [Member] | U.S. Agency Securities [Member]
Securities Sold under Agreements to Repurchase [Abstract]
Total carrying value of collateral pledged	$ 1,998	$ 2,035