Loans (Narrative) (Details)	12 Months Ended
	Dec. 31, 2018 USD ($) loan	Dec. 31, 2017 USD ($) loan	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan loss	$ 10,976,000	$ 10,515,000
Loans and leases receivable, allowance percentage	(0.81%)	(0.91%)
Total number of loans | loan	38	24
Non- accrual delinquent loans	$ 11,152,000	$ 2,483,000
Total non-accrual loans	$ 19,282,000	4,693,000
Percentage of current loans on total non accrual loans	42.00%
Percentage of delinquent loans on total non accrual loans	58.00%
Reserve for delinquent non accrual loans	$ 978,000
Increase in financial receivables past due	534,000
Increase In Non Accrual Loans	14,600,000
Net deferred loan fee and premiums	1,200,000	1,100,000
Deferred loan fee paid by customers	3,100,000	2,800,000
Total deferred loan fee and premiums	4,300,000	3,900,000
Loans receivable	$ 1,346,922,000	$ 1,150,044,000
Percentage status of loan in portfolio	100.00%	100.00%
Performance TDR percentage	99.60%	92.90%
Performance TDR interest rate	5.08%	4.83%
Charge-offs	$ 1,217,000	$ 482,000	$ 1,169,000
Unpaid contractual principal balance	37,208,000	43,618,000
Total recorded investment	36,880,000	43,254,000
Loans, carrying amount	1,337,129,000	1,140,615,000
Non-accrual current loans	8,130,000	2,210,000
Past Due	12,244,000	11,710,000
Loans receivable from related parties	$ 24,852,000	$ 26,476,000	26,464,000	$ 28,105,000
Number of TDR loans | loan	13	16
Number of accrual TDR loans | loan	12	15
Financing receivable post modification recorded investment	$ 6,705,000	$ 10,790,000
Accrual TDR loans	$ 6,676,000	$ 10,021,000
Residential Rentals Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loan security percentage	80.00%
Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | loan	17	7
Non- accrual delinquent loans	$ 8,474,000	$ 1,148,000
Total non-accrual loans	$ 14,632,000	1,987,000
Loan security percentage	80.00%
Loans receivable	$ 878,016,000	$ 727,314,000
Percentage status of loan in portfolio	65.18%	63.25%
Charge-offs	$ 268,000	$ 217,000
Unpaid contractual principal balance	27,835,000	33,180,000
Total recorded investment	27,540,000	32,929,000
Non-accrual current loans	6,158,000	839,000
Past Due	$ 9,151,000	$ 7,859,000
Number of TDR loans | loan	7	9
Financing receivable post modification recorded investment	$ 5,612,000	$ 9,273,000
Commercial Real Estate Portfolio Segment [Member] | Commercial Construction Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage status of loan in portfolio	5.90%	6.20%
Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | loan	5	4
Non- accrual delinquent loans	$ 146,000	$ 478,000
Total non-accrual loans	1,374,000	985,000
Increase (Decrease) in Finance Receivables	11,000,000	25,500,000
Loans receivable	$ 156,709,000	$ 170,374,000
Percentage status of loan in portfolio	11.63%	14.81%
Charge-offs	$ 115,000
Unpaid contractual principal balance	2,527,000	$ 2,455,000
Total recorded investment	2,527,000	2,437,000
Non-accrual current loans	1,228,000	507,000
Past Due	$ 212,000	$ 546,000
Number of TDR loans | loan	1	2
Financing receivable post modification recorded investment	$ 66,000	$ 527,000
Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | loan	5	4
Non- accrual delinquent loans	$ 260,000	$ 84,000
Total non-accrual loans	963,000	825,000
Loans receivable	$ 124,298,000	$ 110,228,000
Percentage status of loan in portfolio	9.23%	9.58%
Charge-offs	$ 84,000	$ 42,000	14,000
Unpaid contractual principal balance	1,745,000	2,389,000
Total recorded investment	1,745,000	2,376,000
Non-accrual current loans	703,000	741,000
Past Due	$ 313,000	$ 291,000
Number of TDR loans | loan	1	1
Financing receivable post modification recorded investment	$ 216,000	$ 221,000
Construction And Land Development Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 29,705,000	$ 27,871,000
Percentage status of loan in portfolio	2.21%	2.42%
Charge-offs		$ 26,000	526,000
Unpaid contractual principal balance	$ 729,000	729,000
Total recorded investment	$ 729,000	$ 729,000
Number of TDR loans | loan	2	2
Financing receivable post modification recorded investment	$ 729,000	$ 729,000
Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | loan	2	4
Non- accrual delinquent loans	$ 147,000	$ 134,000
Total non-accrual loans	147,000	257,000
Loans receivable	$ 35,561,000	$ 21,351,000
Percentage status of loan in portfolio	2.64%	1.86%
Charge-offs	$ 7,000	$ 14,000
Unpaid contractual principal balance	294,000	317,000
Total recorded investment	288,000	317,000
Non-accrual current loans		123,000
Past Due	$ 413,000	$ 171,000
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | loan	2	2
Non- accrual delinquent loans	$ 866,000	$ 172,000
Total non-accrual loans	866,000	172,000
Loans receivable	$ 71,680,000	$ 56,417,000
Percentage status of loan in portfolio	5.32%	4.91%
Charge-offs	$ 94,000	$ 13,000	594,000
Unpaid contractual principal balance	2,762,000	3,010,000
Total recorded investment	2,751,000	2,951,000
Past Due	$ 866,000	$ 1,363,000
Number of TDR loans | loan	1	1
Financing receivable post modification recorded investment	$ 53,000	$ 4,000
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 751,000	$ 573,000
Percentage status of loan in portfolio	0.06%	0.05%
Charge-offs	$ 2,000	$ 2,000	1,000
Unpaid contractual principal balance	1,000
Total recorded investment	1,000
Past Due	$ 5,000	$ 1,000
Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | loan	7	3
Non- accrual delinquent loans	$ 1,259,000	$ 467,000
Total non-accrual loans	1,300,000	467,000
Loans receivable	$ 50,202,000	$ 35,916,000
Percentage status of loan in portfolio	3.73%	3.12%
Charge-offs	$ 647,000	$ 168,000	$ 34,000
Unpaid contractual principal balance	1,315,000	1,538,000
Total recorded investment	1,299,000	1,515,000
Non-accrual current loans	41,000
Past Due	$ 1,284,000	$ 1,479,000
Number of TDR loans | loan	1	1
Financing receivable post modification recorded investment	$ 29,000	$ 36,000
Adjustable Rate Residential Mortgage [Member] | Residential Rentals Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 97,400,000	$ 93,400,000
Percentage status of loan in portfolio	7.20%	8.10%
1-4 Family Units [Member] | Residential Rentals Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 96,600,000	$ 85,000,000
Apartment Buildings Rentals [Member] | Residential Rentals Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	27,700,000	25,200,000
Adjustable Rate Residential First Mortgage [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 54,200,000	$ 56,900,000
Percentage status of loan in portfolio	4.00%	5.00%
Foreclosure Of Stalled Residential Development Project [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Amount of loans removed from troubled debt restructuring		$ 3,000,000
Thirteen Loans And Four Customer Relationships [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | loan	13
Total non-accrual loans	$ 15,300,000
Percentage Status Of Non Accrual Loans	79.00%
Ten Loans And Five Customer Relationships [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total number of loans | loan		10
Total non-accrual loans		$ 3,300,000
Percentage Status Of Non Accrual Loans		71.00%
One Well Secured Classified Relationship [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase In Non Accrual Loans	$ 10,100,000
Three 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	$ 3,900,000
Financing receivable post modification recorded investment	$ 176,000
Financing Receivable Troubled Debt Restructuring [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in loans		$ (4,100,000)
Loans added to troubled debt restructuring | loan	0	0
Interest income recognized on outstanding TDR loans	$ 348,000	$ 327,000
TDR loan principal curtailment		385,000
One Troubled Debt Restructuring Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	29,000	$ 769,000
Specific reserves for TDR loans	$ 165,000
Number of TDR loans | loan	1
Financing receivable post modification recorded investment	$ 1,600,000
Seven Troubled Debt Restructuring Loans with Reserves [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans removed from troubled debt restructuring | loan		7
Amount of loans removed from troubled debt restructuring		$ 3,900,000
Specific reserves for TDR loans		$ 413,000
Number of TDR loans | loan		7
Financing receivable post modification recorded investment		$ 3,000,000
Nonaccrual Loans With No Impairment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	17,400,000	3,800,000
Interest due to debt	$ 456,000	$ 85,000
Percentage status of loan in portfolio	0.91%	1.02%
Nonaccrual Loans With Impairment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total non-accrual loans	$ 1,900,000	$ 876,000
Interest due to debt	$ 81,000	100,000
Minimum [Member] | Residential Rentals Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period	3 years
Minimum [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period	3 years
Minimum [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period	10 years
Minimum [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Bank exposure limit for credit rating	$ 1,000,000
Maximum [Member] | Residential Rentals Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period	20 years
Maximum [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period	20 years
Maximum [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period	30 years
Maximum [Member] | Commercial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Debt maturity period	5 years
Unrated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 333,349,000	283,612,000
Unrated [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	112,280,000	75,581,000
Unrated [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	37,478,000	28,428,000
Unrated [Member] | Construction And Land Development Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,172,000	1,775,000
Unrated [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	19,157,000	14,356,000
Unrated [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	15,373,000	10,856,000
Pass [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	981,347,000	826,030,000
Pass [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	741,037,000	619,604,000
Pass [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	85,551,000	80,279,000
Pass [Member] | Construction And Land Development Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	26,805,000	25,367,000
Pass [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	49,828,000	39,118,000
Pass [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	33,685,000	23,581,000
Special Mention [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable		96,000
Substandard [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	32,226,000	40,306,000
Substandard [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	24,699,000	32,129,000
Substandard [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,269,000	1,521,000
Substandard [Member] | Construction And Land Development Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	728,000	729,000
Substandard [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	2,695,000	2,943,000
Substandard [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,144,000	1,479,000
31 - 60 Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	305,000	1,923,000
31 - 60 Days [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	13,000
31 - 60 Days [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	266,000	19,000
31 - 60 Days [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		892,000
31 - 60 Days [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,000
31 - 60 Days [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	25,000	1,012,000
61 - 89 Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	829,000	7,304,000
61 - 89 Days [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	677,000	6,711,000
61 - 89 Days [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	66,000	68,000
61 - 89 Days [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	53,000	207,000
61 - 89 Days [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		18,000
61 - 89 Days [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		299,000
61 - 89 Days [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	4,000	1,000
61 - 89 Days [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	29,000
90 or Greater Days [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	11,110,000	2,483,000
90 or Greater Days [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	8,474,000	1,148,000
90 or Greater Days [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	146,000	478,000
90 or Greater Days [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	247,000	84,000
90 or Greater Days [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	147,000	134,000
90 or Greater Days [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	866,000	172,000
90 or Greater Days [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	1,230,000	467,000
Performing Financing Receivable [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	156,563,000	169,896,000
Performing Financing Receivable [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	35,414,000	21,217,000
Performing Financing Receivable [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	751,000	$ 573,000
Nonperforming Financing Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Increase (decrease) in loans	$ 14,600,000
Percentage status of loan in portfolio	1.43%	0.41%
Nonperforming Financing Receivable [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 146,000	$ 478,000
Nonperforming Financing Receivable [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	147,000	$ 134,000
PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 3,220,000
Percentage status of loan in portfolio	0.19%
Unpaid contractual principal balance	$ 3,900,000
Total recorded investment	3,200,000
Loans, carrying amount	3,220,000
PCI Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,785,000
PCI Loans [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	466,000
PCI Loans [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	897,000
PCI Loans [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	72,000
All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan loss	10,976,000
Loans receivable	1,343,702,000
Loans, carrying amount	1,333,909,000
All Other Loans [Member] | Commercial Real Estate Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	876,231,000
All Other Loans [Member] | Residential First Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	156,243,000
All Other Loans [Member] | Residential Rentals Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	123,401,000
All Other Loans [Member] | Construction And Land Development Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	29,705,000
All Other Loans [Member] | Home Equity And Second Mortgages Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	35,489,000
All Other Loans [Member] | Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	71,680,000
All Other Loans [Member] | Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	751,000
All Other Loans [Member] | Commercial Equipment Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	50,202,000
County First Acquisition [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 106,887,000
Percentage status of loan in portfolio	7.94%	0.00%
County First Acquisition [Member] | PCI Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 3,220,000
Percentage status of loan in portfolio	0.24%	0.00%
Fair value adjustment	$ 696,000
Percentage change on total loans	17.77%
County First Acquisition [Member] | All Other Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 103,667,000
Percentage status of loan in portfolio	7.70%	0.00%
Fair value adjustment	$ 1,900,000
Percentage change on total loans	1.76%