Allowance For Loan Losses - Allowance For Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 21,461	$ 19,697	$ 18,153
Charge-Offs	(1,926)	(1,744)	(1,482)
Recoveries	484	308	728
Provision (benefit)	(500)	3,200	2,298
Balance, end of period	19,519	21,461	19,697
Individually evaluated for impairment	14	966	614
Collectively evaluated for impairment	19,505	20,495	19,083
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	6,172	5,535	5,906
Charge-Offs	(1,716)	(1,611)	(903)
Recoveries	442	293	699
Provision (benefit)	762	1,955	(167)
Balance, end of period	5,660	6,172	5,535
Individually evaluated for impairment	14	966	614
Collectively evaluated for impairment	5,646	5,206	4,921
Real estate construction one-to-four family
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	629	550	854
Charge-Offs	0	0	(535)
Recoveries	0	0	0
Provision (benefit)	46	79	231
Balance, end of period	675	629	550
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	675	629	550
Real estate construction other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	1,566	1,465	1,439
Charge-Offs	0	0	0
Recoveries	0		0
Provision (benefit)	(291)	101	26
Balance, end of period	1,275	1,566	1,465
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	1,275	1,566	1,465
Real estate term owner occupied
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	2,194	2,358	1,657
Charge-Offs	0	0	0
Recoveries	0	0	0
Provision (benefit)	(167)	(164)	701
Balance, end of period	2,027	2,194	2,358
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	2,027	2,194	2,358
Real estate term non-owner occupied
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	6,043	6,853	5,515
Charge-Offs	0	0	0
Recoveries	0	0	0
Provision (benefit)	(244)	(810)	1,338
Balance, end of period	5,799	6,043	6,853
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	5,799	6,043	6,853
Real estate term other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	725	819	628
Charge-Offs	(28)	(5)	0
Recoveries	3	2	0
Provision (benefit)	16	(91)	191
Balance, end of period	716	725	819
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	716	725	819
Consumer secured by 1st deeds of trust
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	315	313	264
Charge-Offs	(143)	(85)	(36)
Recoveries	12	2	0
Provision (benefit)	122	85	85
Balance, end of period	306	315	313
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	306	315	313
Consumer other
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	307	408	397
Charge-Offs	(39)	(43)	(8)
Recoveries	27	11	29
Provision (benefit)	131	(69)	(10)
Balance, end of period	426	307	408
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	426	307	408
Unallocated
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	3,510	1,396	1,493
Charge-Offs	0	0	0
Recoveries	0	0	0
Provision (benefit)	(875)	2,114	(97)
Balance, end of period	2,635	3,510	1,396
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	$ 2,635	$ 3,510	$ 1,396