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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2017

Stock-Based Compensation [Abstract]

Schedule of stock-based compensation expense

	For the years ended December 31,
(dollars in thousands)		2017			2016		2015
Stock option expense		$	959		746		556
Restricted stock grant expense			299		286		203
Total stock-based compensation expense		$	1,258		1,032		759

Summary of the status of the stock option plan and changes

	For the years ended December 31,
	2017									2016								2015
		Shares			Weighted average exercise price			Weighted Average Remaining Contractual Life		Shares			Weighted average exercise price			Weighted Average Remaining Contractual Life		Shares			Weighted average exercise  price			Weighted Average Remaining Contractual Life
Outstanding at beginning of year		642,203			$	11.77				693,954			$	8.94				667,479			$	7.83
Granted		110,950				35.34				109,500				23.65				93,511				17.15
Exercised		(74,437	)			9.48				(152,751	)			7.19				(67,036	)			9.36
Forfeited or expired		(15,875	)			23.49				(8,500	)			15.69				-				-
Outstanding at end of year		662,841			$	15.70		5.6 years		642,203			$	11.77		5.9 years		693,954			$	8.94		6.0 years
Options exercisable at year-end		419,766			$	9.20		4.1 years		399,256			$	7.62		4.4 years		457,895			$	6.74		4.9 years
Weighted average fair value of options granted during the year					$	14.14							$	10.96							$	9.09
Shares available for grant		359,690								454,765								155,767

Schedule of assumptions used

		2017		2016		2015
Dividend yield		-		-		-
Expected life		7 years		7 years		7 years
Expected volatility		34.63%		43.22%		51.24%
Risk-free interest rate		2.04%		1.65%		1.63%

Summary of the status of the Company's nonvested restricted stock and changes

	December 31,
	2017							2016						2015
					Weighted						Weighted						Weighted
					Average						Average						Average
		Restricted			Grant-Date			Restricted			Grant-Date			Restricted			Grant-Date
		Shares			Fair Value			Shares			Fair Value			Shares			Fair Value
Nonvested at beginning of year		36,125			$	20.13		33,749			$	12.92		49,000			$	11.83
Granted		6,500				35.14		22,000				23.91		3,000				20.65
Vested		(17,625	)			16.73		(17,749	)			11.68		(18,251	)			11.28
Forfeited		-				-		(1,875	)			14.72		-				-
Nonvested at end of year		25,000			$	26.43		36,125			$	20.13		33,749			$	12.92

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Tabular disclosure of the assumptions used to determine for pension plans and/or other employee benefit plans the benefit obligation and net benefit cost, including assumed discount rates, rate increase in compensation increase, and expected long-term rates of return on plan assets.

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Tabular disclosure of the changes in outstanding nonvested restricted stock units.

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Tabular disclosure of employee stock purchase plan activity.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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