Available for Sale Securities (Schedule of gross unrealized losses and fair value, securities in continuous unrealized loss position) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	$ 36,851	$ 1,669
Less Than 12 Months Unrealized Losses	(309)	(4)
12 Months or Longer Fair Value	34,253	96,025
12 Months or Longer Unrealized Losses	(552)	(3,269)
Fair Value	71,104	97,694
Unrealized Losses	(861)	(3,273)
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
12 Months or Longer Fair Value		2,971
12 Months or Longer Unrealized Losses		(65)
Fair Value		2,971
Unrealized Losses		(65)
U.S. government agency mortgage-backed securities-residential
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	35,612	1,669
Less Than 12 Months Unrealized Losses	(302)	(4)
12 Months or Longer Fair Value	27,252	76,586
12 Months or Longer Unrealized Losses	(526)	(2,753)
Fair Value	62,864	78,255
Unrealized Losses	(828)	(2,757)
U.S. government agency securities
Debt Securities, Available-for-sale [Line Items]
12 Months or Longer Fair Value	7,001	16,468
12 Months or Longer Unrealized Losses	(26)	(451)
Fair Value	7,001	16,468
Unrealized Losses	(26)	$ (451)
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	490
Less Than 12 Months Unrealized Losses	(5)
Fair Value	490
Unrealized Losses	(5)
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Less Than 12 Months Fair Value	749
Less Than 12 Months Unrealized Losses	(2)
Fair Value	749
Unrealized Losses	$ (2)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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