Condensed Financial Statements Of Parent Company (Statements Of Cash Flows) (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 22, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 11,915	$ 17,297	$ 16,102
Adjustments to reconcile net earnings to net cash
Deferred tax expense (benefit)	$ 3,500	4,076	(357)	190
Depreciation		1,887	1,224	1,076
Realized securities losses		14	(1,127)	(1,444)
Share-based compensation expense		385	200	151
Earnings on bank owned life insurance		(707)	(1,059)	(1,032)
(Increase) decrease in other assets		668	(894)	(1,077)
Increase in other liabilities		510	2,827	657
Net cash provided by operating activities		24,373	23,210	23,648
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sales of securities available for sale		152,882	72,453	69,632
Principal payments received on securities available for sale		31,902	35,881	38,502
Purchase of available for sale securities		(148,174)	(99,497)	(113,677)
Purchases of premises and equipment		(6,185)	(1,857)	(2,588)
Proceeds from disposal of premises and equipment		0	43	0
Net cash provided by (used in) investing activities		13,969	(128,551)	(58,989)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid on preferred stock		0	0	(191)
Payments of Ordinary Dividends, Common Stock		(5,238)	(4,272)	(3,398)
Exercise of stock options		303	447	51
Repayment of long-term borrowings		(918)	(28,911)	(1,909)
Repayments of Subordinated Debt		0	0	(16,800)
Payments for Repurchase of Common Stock		0	0	(1,080)
Origination of Loans to Employee Stock Ownership Plans		0	0	(2,250)
Net proceeds from issuance of common stock		10	101	4,772
Net cash provided by (used in) financing activities		(32,327)	142,470	32,318
Supplemental Disclosures of Cash Flow Information
Interest		18,201	15,175	12,854
Parent Company [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		11,915	17,297	16,102
Adjustments to reconcile net earnings to net cash
Equity in undistributed net income of subsidiaries		(6,474)	(13,434)	(7,395)
Deferred tax expense (benefit)		346	(214)	(42)
Depreciation		39	36	30
Realized securities losses		0	14	0
Share-based compensation expense		174	96	72
Earnings on bank owned life insurance		(1)	5	4
(Increase) decrease in other assets		535	(277)	5
Increase in other liabilities		512	1,104	943
Net cash provided by operating activities		7,046	4,627	9,719
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sales of securities available for sale		0	86	0
Principal payments received on securities available for sale		0	0	0
Purchase of available for sale securities		0	0	(70)
Purchases of premises and equipment		(92)	(56)	(46)
Proceeds from disposal of premises and equipment		60	0	0
Net cash provided by (used in) investing activities		(32)	30	(116)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid on preferred stock		0	0	(191)
Payments of Ordinary Dividends, Common Stock		(5,238)	(4,272)	(3,398)
Exercise of stock options		303	447	51
Repayment of long-term borrowings		(902)	(1,805)	(1,838)
Repayments of Subordinated Debt		0	0	(16,800)
Payments for Repurchase of Common Stock		0	0	(1,080)
Origination of Loans to Employee Stock Ownership Plans		0	0	(2,250)
Net proceeds from issuance of common stock		10	101	4,772
Net cash provided by (used in) financing activities		(5,827)	(5,529)	(20,734)
Increase (decrease) in cash		1,187	(872)	(11,131)
Cash, Beginning Balance		1,112	1,984	13,115
Cash, Ending Balance		2,299	1,112	1,984
Supplemental Disclosures of Cash Flow Information
Interest		$ 704	$ 654	$ 761