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Loans (Details 3) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Allowance for loan losses
Beginning balance				$ 12,315				$ 10,852	$ 12,315	$ 10,852	$ 8,978
Provision for loan losses	$ 525	$ 950	$ 750	775	$ 400	$ 950	$ 950	1,050	3,000	3,350	3,870
Loans charged off									(2,856)	(3,286)	(2,801)
Recoveries									1,133	1,399	805
Ending balance	13,592				12,315				13,592	12,315	10,852
Commercial real estate
Allowance for loan losses
Beginning balance				4,260				3,577	4,260	3,577	3,127
Provision for loan losses									650	298	784
Loans charged off									0	(207)	(349)
Recoveries									126	592	15
Ending balance	5,036				4,260				5,036	4,260	3,577
Commercial
Allowance for loan losses
Beginning balance				2,011				1,874	2,011	1,874	1,373
Provision for loan losses									112	446	701
Loans charged off									(220)	(375)	(245)
Recoveries									190	66	45
Ending balance	2,093				2,011				2,093	2,011	1,874
Residential real estate
Allowance for loan losses
Beginning balance				2,521				2,205	2,521	2,205	1,845
Provision for loan losses									486	378	436
Loans charged off									(318)	(162)	(188)
Recoveries									148	100	112
Ending balance	2,837				2,521				2,837	2,521	2,205
Consumer
Allowance for loan losses
Beginning balance				2,848				2,766	2,848	2,766	2,160
Provision for loan losses									1,764	1,983	1,992
Loans charged off									(2,318)	(2,542)	(2,019)
Recoveries									669	641	633
Ending balance	2,963				2,848				2,963	2,848	2,766
Unallocated
Allowance for loan losses
Beginning balance				$ 675				$ 430	675	430	473
Provision for loan losses									(12)	245	(43)
Loans charged off									0	0	0
Recoveries									0	0	0
Ending balance	$ 663				$ 675				$ 663	$ 675	$ 430

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Provision (reversal) for loan losses expensed.

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

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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