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Loans - Schedule of Allowance for Loan Losses and Recorded Investment in Financing Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	$ 13,417	$ 14,145	$ 13,976	$ 14,194
Charge-offs	(611)	(41)	(1,437)	(170)
Recoveries	17	44	34	124
Provisions	320	0	570	0
Allowance for Loan Losses, Ending Balance	13,143	14,148	13,143	14,148
Allowance for Loan Losses, Ending Balance	13,417	14,145	13,976	14,194	$ 13,143	$ 13,976	$ 14,148
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	1,229	1,170
Allowance for loan losses: Ending balance: collectively evaluated for impairment					13,143	12,747	12,978
Total Loans Receivable					1,246,798	1,244,170	969,675
Loans receivables: Ending balance: individually evaluated for impairment					7,343	10,337	11,429
Loans Receivable: Ending balance: collectively evaluated for impairment					1,239,455	1,233,833	958,246
Commercial and Industrial
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	2,974	3,252	3,219	3,055
Charge-offs	(489)	(29)	(878)	(69)
Recoveries	4	3	11	9
Provisions	(56)	20	81	251
Allowance for Loan Losses, Ending Balance	2,433	3,246	2,433	3,246
Allowance for Loan Losses, Ending Balance	2,974	3,252	3,219	3,055	2,433	3,219	3,246
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	792	711
Allowance for loan losses: Ending balance: collectively evaluated for impairment					2,433	2,427	2,535
Total Loans Receivable					160,674	165,829	161,225
Loans receivables: Ending balance: individually evaluated for impairment					0	1,499	2,446
Loans Receivable: Ending balance: collectively evaluated for impairment					160,674	164,330	158,779
Commercial Real Estate
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	5,455	4,961	5,228	4,968
Charge-offs	0	0	(33)	0
Recoveries	0	0	0	61
Provisions	266	249	526	181
Allowance for Loan Losses, Ending Balance	5,721	5,210	5,721	5,210
Allowance for Loan Losses, Ending Balance	5,455	4,961	5,228	4,968	5,721	5,228	5,210
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	60	117
Allowance for loan losses: Ending balance: collectively evaluated for impairment					5,721	5,168	5,093
Total Loans Receivable					514,519	492,759	339,026
Loans receivables: Ending balance: individually evaluated for impairment					7,242	8,360	8,503
Loans Receivable: Ending balance: collectively evaluated for impairment					507,277	484,399	330,523
Commercial Real Estate Construction
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	135	149	126	147
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions	11	(14)	20	(12)
Allowance for Loan Losses, Ending Balance	146	135	146	135
Allowance for Loan Losses, Ending Balance	135	149	126	147	146	126	135
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					146	126	135
Total Loans Receivable					19,615	35,560	24,327
Loans receivables: Ending balance: individually evaluated for impairment					0	0	0
Loans Receivable: Ending balance: collectively evaluated for impairment					19,615	35,560	24,327
Residential Mortgage
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	2,936	3,304	3,226	3,478
Charge-offs	(106)	0	(489)	(17)
Recoveries	12	32	22	42
Provisions	(2)	32	81	(135)
Allowance for Loan Losses, Ending Balance	2,840	3,368	2,840	3,368
Allowance for Loan Losses, Ending Balance	2,936	3,304	3,226	3,478	2,840	3,226	3,368
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	377	342
Allowance for loan losses: Ending balance: collectively evaluated for impairment					2,840	2,849	3,026
Total Loans Receivable					431,049	425,893	354,734
Loans receivables: Ending balance: individually evaluated for impairment					101	478	480
Loans Receivable: Ending balance: collectively evaluated for impairment					430,948	425,415	354,254
Home Equity Lines of Credit
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	593	605	612	648
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions	(29)	2	(48)	(41)
Allowance for Loan Losses, Ending Balance	564	607	564	607
Allowance for Loan Losses, Ending Balance	593	605	612	648	564	612	607
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					564	612	607
Total Loans Receivable					106,089	107,792	76,040
Loans receivables: Ending balance: individually evaluated for impairment					0	0	0
Loans Receivable: Ending balance: collectively evaluated for impairment					106,089	107,792	76,040
Consumer
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	725	839	749	923
Charge-offs	(16)	(12)	(37)	(84)
Recoveries	1	9	1	12
Provisions	(37)	(21)	(40)	(36)
Allowance for Loan Losses, Ending Balance	673	815	673	815
Allowance for Loan Losses, Ending Balance	725	839	749	923	673	749	815
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					673	749	815
Total Loans Receivable					14,852	16,337	14,323
Loans receivables: Ending balance: individually evaluated for impairment					0	0	0
Loans Receivable: Ending balance: collectively evaluated for impairment					14,852	16,337	14,323
Unallocated
Allowance for Loan Losses [Roll Forward]
Allowance for Loan Losses, Beginning Balance	599	1,035	816	975
Charge-offs	0	0	0	0
Recoveries	0	0	0	0
Provisions	167	(268)	(50)	(208)
Allowance for Loan Losses, Ending Balance	766	767	766	767
Allowance for Loan Losses, Ending Balance	$ 599	$ 1,035	$ 816	$ 975	766	816	767
Allowance for loan losses: Ending balance: individually evaluated for impairment					0	0	0
Allowance for loan losses: Ending balance: collectively evaluated for impairment					766	816	767
Total Loans Receivable					0	0	0
Loans receivables: Ending balance: individually evaluated for impairment					0	0	0
Loans Receivable: Ending balance: collectively evaluated for impairment					$ 0	$ 0	$ 0

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Amount of recovery of financing receivables doubtful of collection that were previously charged off.

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

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