Available for Sale Securities (Details 1) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	$ 7,441	$ 42,118
Less Than 12 Months Unrealized Losses	(169)	(642)
12 Months or Longer Fair Value	93,821	69,750
12 Months or Longer Unrealized Losses	(5,204)	(2,300)
Fair Value	101,262	111,868
Unrealized Losses	(5,373)	(2,942)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	0	3,001
Less Than 12 Months Unrealized Losses	0	(47)
12 Months or Longer Fair Value	2,928	0
12 Months or Longer Unrealized Losses	(111)	0
Fair Value	2,928	3,001
Unrealized Losses	(111)	(47)
U.S. government agency mortgage-backed securities-residential
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	6,908	34,601
Less Than 12 Months Unrealized Losses	(168)	(542)
12 Months or Longer Fair Value	74,676	56,170
12 Months or Longer Unrealized Losses	(4,387)	(1,928)
Fair Value	81,584	90,771
Unrealized Losses	(4,555)	(2,470)
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	0	3,923
Less Than 12 Months Unrealized Losses	0	(50)
12 Months or Longer Fair Value	16,217	12,603
12 Months or Longer Unrealized Losses	(706)	(359)
Fair Value	16,217	16,526
Unrealized Losses	(706)	(409)
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	533	593
Less Than 12 Months Unrealized Losses	(1)	(3)
12 Months or Longer Fair Value	0	977
12 Months or Longer Unrealized Losses	0	(13)
Fair Value	533	1,570
Unrealized Losses	$ (1)	$ (16)