Investment Securities Schedule of Unrealized Loss on Investments (Details) $ in Thousands	Dec. 31, 2016 USD ($) Securities	Dec. 31, 2015 USD ($) Securities
Investment Securities
Less than 12 Months, Number of Securities | Securities		40
Less than 12 Months, Number of Securities | Securities	83
Less than 12 Months, Fair Value		$ 23,802
Less than 12 Months, Fair Value	$ 43,946
Less than 12 Months, Gross Unrealized Losses		$ (506)
Less than 12 Months, Gross Unrealized Losses	$ (1,147)
12 Months and over, Number of Securities | Securities		12
12 Months and over, Number of Securities | Securities	8
12 Months and Over, Fair Value		$ 6,283
12 Months and Over, Fair Value	$ 3,143
12 Months and Over, Gross Unrealized Losses		$ (186)
12 Months and Over, Gross Unrealized Losses	$ (97)
Total, Number of Securities | Securities		52
Total, Number of Securities | Securities	91
Total, Fair Value		$ 30,085
Total, Fair Value	$ 47,089
Total, Gross Unrealized Losses		$ (692)
Total, Gross Unrealized Losses	$ (1,244)
U.S. Government-sponsored enterprises [Member]
Investment Securities
Less than 12 Months, Number of Securities | Securities		12
Less than 12 Months, Number of Securities | Securities	13
Less than 12 Months, Fair Value		$ 9,081
Less than 12 Months, Fair Value	$ 8,351
Less than 12 Months, Gross Unrealized Losses		$ (157)
Less than 12 Months, Gross Unrealized Losses	$ (180)
12 Months and over, Number of Securities | Securities		5
12 Months and over, Number of Securities | Securities	3
12 Months and Over, Fair Value		$ 3,607
12 Months and Over, Fair Value	$ 1,172
12 Months and Over, Gross Unrealized Losses		$ (87)
12 Months and Over, Gross Unrealized Losses	$ (16)
Total, Number of Securities | Securities		17
Total, Number of Securities | Securities	16
Total, Fair Value		$ 12,688
Total, Fair Value	$ 9,523
Total, Gross Unrealized Losses		$ (244)
Total, Gross Unrealized Losses	$ (196)
Agency MBS [Member]
Investment Securities
Less than 12 Months, Number of Securities | Securities	22	12
Less than 12 Months, Fair Value	$ 15,141	$ 7,459
Less than 12 Months, Gross Unrealized Losses	$ (261)	$ (58)
12 Months and over, Number of Securities | Securities	1	1
12 Months and Over, Fair Value	$ 344	$ 259
12 Months and Over, Gross Unrealized Losses	$ (8)	$ (6)
Total, Number of Securities | Securities	23	13
Total, Fair Value	$ 15,485	$ 7,718
Total, Gross Unrealized Losses	$ (269)	$ (64)
State and political subdivisions [Member]
Investment Securities
Less than 12 Months, Number of Securities | Securities	40	4
Less than 12 Months, Fair Value	$ 16,481	$ 1,512
Less than 12 Months, Gross Unrealized Losses	$ (650)	$ (14)
12 Months and over, Number of Securities | Securities	0	2
12 Months and Over, Fair Value	$ 0	$ 785
12 Months and Over, Gross Unrealized Losses	$ 0	$ (11)
Total, Number of Securities | Securities	40	6
Total, Fair Value	$ 16,481	$ 2,297
Total, Gross Unrealized Losses	$ (650)	$ (25)
Corporate [Member]
Investment Securities
Less than 12 Months, Number of Securities | Securities	8	12
Less than 12 Months, Fair Value	$ 3,973	$ 5,750
Less than 12 Months, Gross Unrealized Losses	$ (56)	$ (277)
12 Months and over, Number of Securities | Securities	4	4
12 Months and Over, Fair Value	$ 1,627	$ 1,632
12 Months and Over, Gross Unrealized Losses	$ (73)	$ (82)
Total, Number of Securities | Securities	12	16
Total, Fair Value	$ 5,600	$ 7,382
Total, Gross Unrealized Losses	$ (129)	$ (359)