Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2016

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

A summary of consolidated financial data for each of the four quarters of 2016, 2015 and 2014 is presented below:

	Quarters in 2016 Ended
	March 31,		June 30,		Sept. 30,		Dec. 31,
	(Dollars in thousands, except per share data)
Interest and dividend income	$	6,448	$	6,688	$	6,786	$	6,914
Interest expense	513		519		471		$	558
Net interest income	5,935		6,169		6,315		6,356
Provision for loan losses	75		75		—		—
Noninterest income	2,186		2,597		2,804		2,553
Noninterest expenses	5,821		5,926		6,179		6,295
Net income	1,759		2,139		2,268		2,345
Earnings per common share	$	0.39	$	0.48	$	0.51	$	0.53

	Quarters in 2015 Ended
	March 31,		June 30,		Sept. 30,		Dec. 31,
	(Dollars in thousands, except per share data)
Interest and dividend income	$	6,117	$	6,276	$	6,373	$	6,378
Interest expense	565		521		461		478
Net interest income	5,552		5,755		5,912		5,900
Provision for loan losses	100		150		150		150
Noninterest income	2,335		2,526		2,533		2,398
Noninterest expenses	5,390		5,556		5,674		5,684
Net income	1,884		2,017		2,050		1,927
Earnings per common share	$	0.42	$	0.46	$	0.45	$	0.44

	Quarters in 2014 Ended
	March 31,		June 30,		Sept. 30,		Dec. 31,
	(Dollars in thousands, except per share data)
Interest and dividend income	$	6,112	$	6,184	$	6,258	$	6,298
Interest expense	577		529		528		521
Net interest income	5,535		5,655		5,730		5,777
Provision for loan losses	75		75		150		45
Noninterest income	1,953		2,126		2,709		2,121
Noninterest expenses	5,179		5,286		5,552		5,577
Net income	1,764		1,919		2,126		1,885
Earnings per common share	$	0.40	$	0.43	$	0.47	$	0.43