Repurchase Agreements (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	$ 20,214	$ 18,177
Total liability recognized for repurchase agreements	16,643	14,307
U.S. Agency Securities [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	20,214	18,177
Overnight and Continuous [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	18,153	16,118
Overnight and Continuous [Member] | U.S. Agency Securities [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	18,153	16,118
Up to 30 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	0	0
Up to 30 Days [Member] | U.S. Agency Securities [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	0	0
30 - 90 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	0	0
30 - 90 Days [Member] | U.S. Agency Securities [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	0	0
Greater than 90 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	2,061	2,059
Greater than 90 Days [Member] | U.S. Agency Securities [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Total carrying value of collateral pledged	$ 2,061	$ 2,059