Consolidated Statements of Shareholders' Equity (unaudited) - USD ($) $ in Thousands	Total		Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]	Unearned ESOP Shares [Member]	Common Stock and Related Surplus [Member]
Stock Issued During Period, Value, Acquisitions	$ 32,968					$ 32,968
Beginning Balance at Dec. 31, 2016	155,360		$ (3,262)	$ 113,448	$ (1,583)	46,757
Comprehensive income:
Net income	3,662			3,662
Other comprehensive income	2,956		2,956
Stock Issued During Period, Value, Stock Options Exercised	12					12
Share-based compensation expense	184					184
Stock Issued During Period, Value, Employee Stock Ownership Plan	453				213	240
Stock Issued During Period, Value, Dividend Reinvestment Plan	69					69
Common stock cash dividends declared	(2,532)			(2,532)
Ending Balance at Jun. 30, 2017	193,132		(306)	114,578	(1,370)	80,230
Beginning Balance at Dec. 31, 2017	201,505	[1]	1,732	119,827	(1,152)	81,098
Comprehensive income:
Net income	13,723			13,723
Other comprehensive income	(2,718)		(2,718)
Stock Issued During Period, Value, Stock Options Exercised	4					4
Share-based compensation expense	193					193
Stock Issued During Period, Value, Employee Stock Ownership Plan	260				109	151
Stock Issued During Period, Value, Dividend Reinvestment Plan	126					126
Common stock cash dividends declared	(3,214)			(3,214)
Ending Balance at Jun. 30, 2018	$ 209,879		$ (986)	$ 130,336	$ (1,043)	$ 81,572

[1] Derived from audited consolidated financial statements