Loans and the Allowance for Loan Losses (Allowance for Loan Losses and Recorded Investment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance
Beginning Balance	$ 16,008	$ 13,563	$ 13,399
Charge-offs	(7,484)	0	(186)
Recoveries	362	325	200
Provisions	6,919	2,120	150
Ending balance	15,805	16,008	13,563
Ending balance: individually evaluated for impairment	420	3,026
Ending balance: collectively evaluated for impairment	15,385	12,982
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans
Ending balance:	1,978,909	1,049,698
Ending balance: individually evaluated for impairment	5,713	8,063
Ending balance: collectively evaluated for impairment	1,968,227	1,041,635
Ending balance: loans acquired with deteriorated credit quality	4,969	0
Commercial real estate - owner occupied [Member]
Allowance
Beginning Balance	2,943	3,042	3,229
Charge-offs	0	0	0
Recoveries	17	0	0
Provisions	1,320	(99)	(187)
Ending balance	4,280	2,943	3,042
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	4,280	2,943
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans
Ending balance:	467,082	250,440
Ending balance: individually evaluated for impairment	1,393	335
Ending balance: collectively evaluated for impairment	464,030	250,105
Ending balance: loans acquired with deteriorated credit quality	1,659	0
Commercial real estate - non-owner occupied [Member]
Allowance
Beginning Balance	2,145	1,862	1,894
Charge-offs	0	0	0
Recoveries	0	0	0
Provisions	959	283	(32)
Ending balance	3,104	2,145	1,862
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	3,104	2,145
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans
Ending balance:	436,083	184,688
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	435,109	184,688
Ending balance: loans acquired with deteriorated credit quality	974	0
Residential real estate [Member]
Allowance
Beginning Balance	2,510	2,862	3,308
Charge-offs	0	0	0
Recoveries	131	40	61
Provisions	(460)	(392)	(507)
Ending balance	2,181	2,510	2,862
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	2,181	2,510
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans
Ending balance:	489,669	204,413
Ending balance: individually evaluated for impairment	166	606
Ending balance: collectively evaluated for impairment	487,390	203,807
Ending balance: loans acquired with deteriorated credit quality	2,113	0
Commercial [Member]
Allowance
Beginning Balance	7,053	4,612	4,284
Charge-offs	(7,457)	0	(186)
Recoveries	209	285	102
Provisions	5,645	2,156	412
Ending balance	5,450	7,053	4,612
Ending balance: individually evaluated for impairment	234	2,805
Ending balance: collectively evaluated for impairment	5,216	4,248
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans
Ending balance:	463,652	311,486
Ending balance: individually evaluated for impairment	3,107	6,182
Ending balance: collectively evaluated for impairment	460,369	305,304
Ending balance: loans acquired with deteriorated credit quality	176	0
Real estate construction [Member]
Allowance
Beginning Balance	1,277	1,056	596
Charge-offs	0	0	0
Recoveries	0	0	37
Provisions	(571)	221	423
Ending balance	706	1,277	1,056
Ending balance: individually evaluated for impairment	186	221
Ending balance: collectively evaluated for impairment	520	1,056
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans
Ending balance:	97,481	91,822
Ending balance: individually evaluated for impairment	865	940
Ending balance: collectively evaluated for impairment	96,616	90,882
Ending balance: loans acquired with deteriorated credit quality	0	0
Consumer [Member]
Allowance
Beginning Balance	80	129	88
Charge-offs	(27)	0	0
Recoveries	5	0	0
Provisions	26	(49)	41
Ending balance	84	80	$ 129
Ending balance: individually evaluated for impairment	0	0
Ending balance: collectively evaluated for impairment	84	80
Ending balance: loans acquired with deteriorated credit quality	0	0
Loans
Ending balance:	24,942	6,849
Ending balance: individually evaluated for impairment	182	0
Ending balance: collectively evaluated for impairment	24,713	6,849
Ending balance: loans acquired with deteriorated credit quality	$ 47	$ 0