Parent-only Financial Statements, Condensed Statements of Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Expense [Abstract]
Interest expense									$ 7,169	$ 4,739	$ 3,303
Income Before Taxes	$ 6,753	$ 6,315	$ 6,379	$ 6,350	$ 4,567	$ 5,950	$ 6,689	$ 6,583	25,797	23,789	16,817
Income tax benefit	1,192	(395)	0	0	0	0	0	0	797	0	0
Net Income	$ 5,561	$ 6,710	$ 6,379	$ 6,350	$ 4,567	$ 5,950	$ 6,689	$ 6,583	25,000	23,789	16,817
Parent Company [Member]
Income [Abstract]
Dividends received from subsidiary bank									11,930	10,765	8,050
Expense [Abstract]
Interest expense									175	238	263
Other									315	0	0
Total expense									490	238	263
Income before income taxes and equity in undistributed net income of bank subsidiary									11,440	10,527	7,787
Equity in undistributed net income of bank subsidiary									13,521	13,262	9,030
Income Before Taxes									24,961	23,789	16,817
Income tax benefit									(39)	0	0
Net Income									$ 25,000	$ 23,789	$ 16,817