Changes in Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Changes in Accumulated Other Comprehensive Loss (Details)
Other comprehensive income, before tax amount, beginning	$ (117)	$ (73)
Other comprehensive income, Deferred Taxes, beginning	25	16
Other comprehensive income, Net of tax Amount, beginning	(92)	(57)
Unrealized holding gain arising during period, before tax amount	73	(68)
Unrealized holding gain arising during period, deferred taxes	(15)	14
Unrealized holding gain arising during period, net of tax amount	58	(54)
Other comprehensive income loss, net, before tax amount	73	(68)
Other comprehensive income loss, net, taxes	(15)	14
Other comprehensive income loss, net, net after tax amount	58	(54)
Other comprehensive income, before tax amount, ending	(44)	(141)
Other comprehensive income, Deferred Taxes, ending	10	30
Other comprehensive income, Net of tax Amount, ending	$ (34)	$ (111)