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Loans and Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 1,323,258	$ 813,376
Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	32,794	27,193
Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	23,558	21,173
Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,637	3,289
Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	538	12
Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,308	2,692
Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	753	27
All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,290,464	786,183
All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,270,417	782,438
All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,668	1,531
All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,852	341
All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,241	1,873
All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	286	0
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	642,988	415,208
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	17,903	14,943
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	14,386	11,836
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	261	1,045
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,084	2,062
Commercial Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	172	0
Commercial Real Estate [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	625,085	400,265
Commercial Real Estate [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	616,028	399,505
Commercial Real Estate [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,673	640
Commercial Real Estate [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,006	0
Commercial Real Estate [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	378	120
Commercial Real Estate [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	293,457	187,802
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	7,450	9,004
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,151	6,811
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,345	1,577
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	456	0
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,192	616
Consumer Real Estate [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	306	0
Consumer Real Estate [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	286,007	178,798
Consumer Real Estate [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	279,464	177,466
Consumer Real Estate [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,543	550
Consumer Real Estate [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	2,627	104
Consumer Real Estate [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,159	678
Consumer Real Estate [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	214	0
Construction and Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	135,409	117,869
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	5,120	1,678
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	4,134	1,019
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	649	645
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	337	14
Construction and Land Development [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Construction and Land Development [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	130,289	116,191
Construction and Land Development [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	129,359	115,237
Construction and Land Development [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	383	89
Construction and Land Development [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Construction and Land Development [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	547	865
Construction and Land Development [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Commercial and Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	238,087	85,022
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	858	1,568
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	68	1,507
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	120	22
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	58	12
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	588	0
Commercial and Industrial [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	24	27
Commercial and Industrial [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	237,229	83,454
Commercial and Industrial [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	233,942	82,992
Commercial and Industrial [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	3,007	252
Commercial and Industrial [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	64	0
Commercial and Industrial [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	157	210
Commercial and Industrial [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	59	0
Consumer and Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	13,317	7,475
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	1,463	0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	819	0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	262	0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	24	0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	107	0
Consumer and Other [Member] | Purchased Credit Impaired Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	251	0
Consumer and Other [Member] | All Other Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,854	7,475
Consumer and Other [Member] | All Other Loans [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	11,624	7,238
Consumer and Other [Member] | All Other Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	62	0
Consumer and Other [Member] | All Other Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	155	237
Consumer and Other [Member] | All Other Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	0	0
Consumer and Other [Member] | All Other Loans [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total loans	$ 13	$ 0

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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