Available for Sale Securities (Details 1) - USD ($) $ in Thousands	Jun. 30, 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	53,787	96,025
12 Months or Longer Unrealized Losses	(703)	(3,269)
Fair Value	53,787	97,694
Unrealized Losses	(703)	(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	0	2,971
12 Months or Longer Unrealized Losses	0	(65)
Fair Value	0	2,971
Unrealized Losses	0	(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	40,967	76,586
12 Months or Longer Unrealized Losses	(586)	(2,753)
Fair Value	40,967	78,255
Unrealized Losses	(586)	(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	12,820	16,468
12 Months or Longer Unrealized Losses	(117)	(451)
Fair Value	12,820	16,468
Unrealized Losses	$ (117)	$ (451)