Securities, Gains (Loss) on Securities, Securities Pledged, and Securities Sold Under Agreements to Repurchase (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2008
Gains (Loss) on Sales of Securities [Abstract}
Net securities gain (loss)	$ 204	$ 2	$ 560	$ (286)
Net gain (loss) realized on sales and calls of AFS securities	5	2	6	(286)
Realized pre-tax gain on sales and calls of AFS securities	78	3	79	284
Realized pre-tax loss on sales and calls of AFS securities	73	$ 1	73	$ 570
Unrealized gain from equity securities	199		554
Equity securities at fair value	1,727		1,727		$ 1,173
Securities pledged as collateral to secure public deposit and for other purposes	238,500		238,500		258,800
Amortized cost of securities sold under agreements to repurchase	272,200		272,200		289,100
Class B Restricted Stock [Member]
Gains (Loss) on Sales of Securities [Abstract}
Number of shares of stock acquired (in shares)						9,918
Gain on recognition of fair value of equity securities					$ 1,200
Number of shares held in portfolio (in shares)					9,918
Equity securities at fair value	$ 1,700		$ 1,700