Loans (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019 USD ($) Loan	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) loan Loan	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($) loan Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan loss	$ 10,918		$ 10,918		$ 10,976
Loans and leases receivable, allowance percentage	(0.79%)		(0.79%)		(0.81%)
Net deferred costs (fees)	$ 1,363		$ 1,363		$ 1,183
Deferred loan fees and premiums include net deferred fees paid by customers	3,200		3,200		3,100
Offset by net deferred premiums paid to purchase loans	$ 4,600		$ 4,600		$ 4,300
Total number of loans | Loan	35		35		38
Non- accrual delinquent loans	$ 10,600		$ 10,600		$ 11,152
Total non-accrual loans	(13,288)		(13,288)		(19,282)
Reserve for delinquent non accrual loans	886		886		978
Increase In non accrual loans		$ 10,100			14,600
Loans receivable	$ 1,387,186	1,290,415	$ 1,387,186	$ 1,290,415	$ 1,346,922
Percentage status of loan in portfolio	100.00%		100.00%		100.00%
Charge-offs	$ 333	164	$ 1,075	744
Unpaid contractual principal balance	27,515	36,178	27,515	36,178	$ 37,208
Total recorded investment	27,458	35,787	27,458	35,787	36,880
Loans, carrying amount	1,377,631		1,377,631		1,337,129
Non-accrual current loans	2,688		2,688		8,130
Past Due	12,646		12,646		$ 12,244
PCI Loans, accretion interest	$ 209		$ 381
Number of TDR loans | Loan			8		13
Number of accrual TDR loans | Loan	6		6		12
Financing receivable post modification recorded investment	$ 2,248		$ 2,248		$ 6,705
Accrual TDR loans	2,196		2,196		6,676
Reclassification from (to) nonaccretable difference	156	0	156	0	134
Other changes, net	$ 11	0	$ 11	0	$ 313
Twelve Loans And Four Customer Relationships [Member] [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | Loan	12		12
Percentage status of non accrual loans			81.00%
Increase (decrease) in finance receivables			$ 10,800
Thirteen Loans Representing Four Customer Relationships [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | Loan					13
Percentage status of non accrual loans					79.00%
Increase (decrease) in finance receivables					$ 15,300
Financing Receivable Troubled Debt Restructuring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in finance receivables			(4,500)
TDR loan principal curtailment					176
One Troubled Debt Restructuring Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	$ (52)		(52)		29
Specific reserves for TDR loans	251		$ 251
Number of TDR loans | loan			4
Financing receivable post modification recorded investment	$ 1,600		$ 1,600
Seven Troubled Debt Restructuring Loans with Reserves [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Specific reserves for TDR loans					$ 165
Number of TDR loans | loan					1
Financing receivable post modification recorded investment					$ 1,600
Seven Trouble Debt Restructuring Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans removed from troubled debt restructuring | loan					3
Amount of loans removed from troubled debt restructuring					$ 3,900
Nonaccrual Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Decrease In non accrual loans					$ 6,000
Total number of loans | Loan	35		35		38
Increase (decrease) in finance receivables			$ 13,300		$ 19,300
Percentage status of loan in portfolio	0.96%		0.96%		1.43%
Nonaccrual Loans With No Impairment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- accrual delinquent loans	$ 2,700		$ 2,700		$ 8,100
Total non-accrual loans	(11,600)		$ (11,600)		$ (17,400)
Percentage of current loans on total non accrual loans			20.00%		42.00%
Interest due to debt			$ 245		$ 456
Nonaccrual Loans With Impairment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non- accrual delinquent loans	10,600		10,600		11,200
Total non-accrual loans	(1,700)		$ (1,700)		$ (1,900)
Percentage of delinquent loans on total non accrual loans			80.00%		58.00%
Interest due to debt			$ 143		$ 81
Unrated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	334,195		334,195		333,349
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,026,845		1,026,845		981,347
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 26,146		$ 26,146		$ 32,226
Residential Rentals Portfolio Segment [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period			3 years
Residential Rentals Portfolio Segment [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period			20 years
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | Loan	13		13		17
Non- accrual delinquent loans	$ 8,938		$ 8,938		$ 8,474
Total non-accrual loans	(9,790)		(9,790)		(14,632)
Loans receivable	$ 917,948	828,445	$ 917,948	828,445	$ 878,016
Percentage status of loan in portfolio	66.18%		66.18%		65.18%
Charge-offs	$ 4	0	$ 4	236
Unpaid contractual principal balance	20,933	26,804	20,933	26,804	$ 27,835
Total recorded investment	20,918	26,492	20,918	26,492	27,540
Non-accrual current loans	852		852		6,158
Past Due	10,305		$ 10,305		$ 9,151
Number of TDR loans | Loan			4		7
Financing receivable post modification recorded investment	2,082		$ 2,082		$ 5,612
Commercial Real Estate Portfolio Segment [Member] | Unrated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	106,552		106,552		112,280
Commercial Real Estate Portfolio Segment [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	790,002		790,002		741,037
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 21,394		$ 21,394		$ 24,699
Commercial Real Estate Portfolio Segment [Member] | Commercial Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage status of loan in portfolio	8.30%		8.30%		5.90%
Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan loss	$ 10,900		$ 10,900		$ 11,000
Total number of loans | Loan	4		4		5
Non- accrual delinquent loans	$ 146		$ 146		$ 146
Total non-accrual loans	(992)		(992)		(1,374)
Increase (decrease) in finance receivables			15,300		11,000
Loans receivable	$ 156,670	163,090	$ 156,670	163,090	$ 156,709
Percentage status of loan in portfolio	11.29%		11.29%		11.63%
Charge-offs		76		113
Unpaid contractual principal balance	$ 2,124	2,473	$ 2,124	2,473	$ 2,527
Total recorded investment	2,123	2,434	2,123	2,434	2,527
Non-accrual current loans	846		846		1,228
Past Due	474		$ 474		$ 212
Number of TDR loans | Loan			1		1
Financing receivable post modification recorded investment	65		$ 65		$ 66
Residential First Mortgages Portfolio Segment [Member] | Adjustable Rate Residential First Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 54,500		$ 54,500		$ 54,200
Percentage status of loan in portfolio	3.90%		3.90%		4.00%
Residential First Mortgages Portfolio Segment [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period			10 years
Residential First Mortgages Portfolio Segment [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period			30 years
Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | Loan	5		5		5
Non- accrual delinquent loans	$ 0		$ 0		$ 260
Total non-accrual loans	(971)		(971)		(963)
Loans receivable	$ 121,990	127,469	$ 121,990	127,469	$ 124,298
Percentage status of loan in portfolio	8.79%		8.79%		9.23%
Charge-offs			$ 53
Unpaid contractual principal balance	$ 971	1,430	971	1,430	$ 1,745
Total recorded investment	971	1,396	971	1,396	1,745
Non-accrual current loans	971		971		703
Past Due	321		$ 321		$ 313
Number of TDR loans | Loan			0		1
Financing receivable post modification recorded investment	0		$ 0		$ 216
Residential Rentals Portfolio Segment [Member] | 1-4 Family Units [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	93,300		93,300		96,600
Residential Rentals Portfolio Segment [Member] | Apartment Buildings Rentals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	28,700		28,700		27,700
Residential Rentals Portfolio Segment [Member] | Adjustable Rate Residential Rentals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 97,800		$ 97,800		$ 97,400
Percentage status of loan in portfolio	7.10%		7.10%		7.20%
Residential Rentals Portfolio Segment [Member] | Minimum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period			3 years
Residential Rentals Portfolio Segment [Member] | Maximum [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period			20 years
Residential Rentals Portfolio Segment [Member] | Unrated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 38,698		$ 38,698		$ 37,478
Residential Rentals Portfolio Segment [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	82,614		82,614		85,551
Residential Rentals Portfolio Segment [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	678		678		1,269
Construction And Land Development Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 35,662	28,647	$ 35,662	28,647	$ 29,705
Percentage status of loan in portfolio	2.57%		2.57%		2.21%
Charge-offs	$ 329		$ 329
Unpaid contractual principal balance		729		729	$ 729
Total recorded investment		729		729	$ 729
Number of TDR loans | Loan			0		2
Financing receivable post modification recorded investment	0		$ 0		$ 729
Construction And Land Development Portfolio Segment [Member] | Unrated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,017		2,017		2,172
Construction And Land Development Portfolio Segment [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	33,645		33,645		26,805
Construction And Land Development Portfolio Segment [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable					728
Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 35,866		$ 35,866		$ 35,561
Percentage status of loan in portfolio	2.59%		2.59%		2.64%
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | Loan	2		2		2
Non- accrual delinquent loans	$ 819		$ 819		$ 866
Total non-accrual loans	(819)		(819)		(866)
Loans receivable	$ 67,617	57,519	$ 67,617	57,519	$ 71,680
Percentage status of loan in portfolio	4.87%		4.87%		5.32%
Charge-offs		88		88
Unpaid contractual principal balance	$ 2,638	2,792	$ 2,638	2,792	$ 2,762
Total recorded investment	2,626	2,792	2,626	2,792	2,751
Past Due	819		$ 819		$ 866
Number of TDR loans | Loan			0		1
Financing receivable post modification recorded investment	0		$ 0		$ 53
Commercial Portfolio Segment [Member] | Unrated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	18,539		18,539		19,157
Commercial Portfolio Segment [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	46,452		46,452		49,828
Commercial Portfolio Segment [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,626		2,626		2,695
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 967	801	$ 967	801	$ 751
Percentage status of loan in portfolio	0.07%		0.07%		0.06%
Charge-offs		0	$ 4	1
Unpaid contractual principal balance		2		2	$ 1
Total recorded investment		2		2
Past Due	$ 1		$ 1		$ 5
Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | Loan	6		6		7
Non- accrual delinquent loans	$ 281		$ 281		$ 1,259
Total non-accrual loans	(300)		(300)		(1,300)
Loans receivable	$ 50,466	47,418	$ 50,466	47,418	$ 50,202
Percentage status of loan in portfolio	3.64%		3.64%		3.73%
Charge-offs		0	$ 685	299
Unpaid contractual principal balance	$ 367	1,645	367	1,645	$ 1,315
Total recorded investment	349	1,643	349	1,643	1,299
Non-accrual current loans	19		19		41
Past Due	286		$ 286		$ 1,284
Number of TDR loans | Loan			3		1
Financing receivable post modification recorded investment	101		$ 101		$ 29
Commercial Equipment Portfolio Segment [Member] | Unrated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	18,230		18,230		15,373
Commercial Equipment Portfolio Segment [Member] | Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	32,018		32,018		33,685
Commercial Equipment Portfolio Segment [Member] | Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	218		218		1,144
31 - 60 Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	364		364		305
31 - 60 Days [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	309		309
31 - 60 Days [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0		13
31 - 60 Days [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
31 - 60 Days [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1		1		1
31 - 60 Days [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	30		30		25
61 - 89 Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,823		1,823		829
61 - 89 Days [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,058		1,058		677
61 - 89 Days [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	328		328		66
61 - 89 Days [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	321		321		53
61 - 89 Days [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0
61 - 89 Days [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due					4
61 - 89 Days [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	10		10		29
90 or Greater Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	10,459		10,459		11,110
90 or Greater Days [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	8,938		8,938		8,474
90 or Greater Days [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	146		146		146
90 or Greater Days [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0		0		247
90 or Greater Days [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	819		819		866
90 or Greater Days [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	246		246		1,230
Loan Delinquency [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	$ (12,600)		$ (12,600)		(12,200)
Decrease in loan delinquency					$ 402
Percentage status of loan in portfolio	0.91%		0.91%		0.91%
Performing Financial Instruments [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 156,524		$ 156,524		$ 156,563
Performing Financial Instruments [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	967		967		751
Nonperforming Financial Instruments [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	146		146		146
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 2,772	3,838	$ 2,772	3,838	3,220
Percentage status of loan in portfolio	0.16%		0.16%
Unpaid contractual principal balance	$ 3,500		$ 3,500
Total recorded investment	2,800		2,800
Loans, carrying amount	2,772		2,772		3,220
PCI Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,725	1,503	1,725	1,503	1,785
PCI Loans [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	451	470	451	470	466
PCI Loans [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	327	1,274	327	1,274	897
PCI Loans [Member] | Construction And Land Development Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable		$ 272		$ 272
PCI Loans [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	269		269		72
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan loss	10,918		10,918		10,976
Net deferred costs (fees)	1,363		1,363		1,183
Loans receivable	1,384,414		1,384,414		1,343,702
Loans, carrying amount	1,374,859		1,374,859		1,333,909
All Other Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	916,223		916,223		876,231
All Other Loans [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	156,219		156,219		156,243
All Other Loans [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	121,663		121,663		123,401
All Other Loans [Member] | Construction And Land Development Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	35,662		35,662		29,705
All Other Loans [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	35,597		35,597		35,489
All Other Loans [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	67,617		67,617		71,680
All Other Loans [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	967		967		751
All Other Loans [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	50,466		50,466		50,202
County First Acquisition [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 91,125		$ 91,125		$ 106,887
Percentage status of loan in portfolio	6.57%		6.57%		7.94%
County First Acquisition [Member] | PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 2,772		$ 2,772		$ 3,220
Percentage status of loan in portfolio	0.20%		0.20%		0.24%
County First Acquisition [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 88,353		$ 88,353		$ 103,667
Percentage status of loan in portfolio	6.37%		6.37%		7.70%
County First Bank Acquisition [Member] | PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
New acquisition accounting for fair market value adjustment	$ 684		$ 684
Net acquisition accounting fair Market value adjustment, mark	19.78%		19.78%
County First Bank Acquisition [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
New acquisition accounting for fair market value adjustment	$ 1,500		$ 1,500
Net acquisition accounting fair Market value adjustment, mark	1.66%		1.66%