Available for Sale Securities (Details 1) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	$ 0	$ 1,669
Less Than 12 Months Unrealized Losses	0	(4)
12 Months or Longer Fair Value	91,672	96,025
12 Months or Longer Unrealized Losses	(2,071)	(3,269)
Fair Value	91,672	97,694
Unrealized Losses	(2,071)	(3,273)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	0	0
Less Than 12 Months Unrealized Losses	0	0
12 Months or Longer Fair Value	2,990	2,971
12 Months or Longer Unrealized Losses	(43)	(65)
Fair Value	2,990	2,971
Unrealized Losses	(43)	(65)
U.S. government agency mortgage-backed securities-residential
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	0	1,669
Less Than 12 Months Unrealized Losses	0	(4)
12 Months or Longer Fair Value	72,050	76,586
12 Months or Longer Unrealized Losses	(1,746)	(2,753)
Fair Value	72,050	78,255
Unrealized Losses	(1,746)	(2,757)
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	0	0
Less Than 12 Months Unrealized Losses	0	0
12 Months or Longer Fair Value	16,632	16,468
12 Months or Longer Unrealized Losses	(282)	(451)
Fair Value	16,632	16,468
Unrealized Losses	$ (282)	$ (451)