Loans and Allowance for Loan Losses - Primary Segments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2017
Primary segments of the loan portfolio:
Individually evaluated for impairment	$ 15,436		$ 12,387
Collectively evaluated for impairment	1,280,689		1,081,413
Total Loans	1,296,125	$ 1,105,306	1,093,800
Commercial
Primary segments of the loan portfolio:
Individually evaluated for impairment	11,704		10,457
Collectively evaluated for impairment	917,580		771,739
Total Loans	929,284	783,909	782,196
Residential
Primary segments of the loan portfolio:
Individually evaluated for impairment	3,287		1,166
Collectively evaluated for impairment	295,462		233,070
Total Loans	298,749	246,214	234,236
Home Equity
Primary segments of the loan portfolio:
Individually evaluated for impairment	111		581
Collectively evaluated for impairment	57,518		63,692
Total Loans	57,629	62,400	64,273
Consumer
Primary segments of the loan portfolio:
Individually evaluated for impairment	334		183
Collectively evaluated for impairment	10,129		12,912
Total Loans	$ 10,463	$ 12,783	$ 13,095

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The balance of financing receivables that were collectively evaluated for impairment.

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The balance of financing receivables that were individually evaluated for impairment.

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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.

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