Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Summary of the activity in the Option Plan

Below is a summary of the stock option activity in the Plans for the year ended December 31, 2016:

	2016
	Number of Stock Options Outstanding		Weighted Average Exercise Price Per Share		Weighted Average Remaining Contractual Term	Aggregate Intrinsic value
					(in years)	(dollars in thousands)
Outstanding at January 1, 2016	1,059,086		$	11.35
Granted	155,000		20.51
Exercised	(117,750	)	11.39
Forfeited and Expired	(12,669	)	14.58
Outstanding at December 31, 2016	1,083,667		$	12.61	6.2	$	24,639
Vested and exercisable at December 31, 2016	716,651		$	10.10	5.1	$	18,094

Schedule of assumptions used for valuing options granted with the Black-Scholes model

Options granted under the Option Plans during 2016, 2015 and 2014 were valued using the Black-Scholes model with the following average assumptions:

	Year Ended December 31,
	2016	2015	2014
Expected volatility	21.98% - 26.88%	29.47%	18.47% - 21.72%
Expected term	6.00 Years	6.00 Years	6.00 Years
Expected dividends	None	None	None
Risk free rate	1.32% - 1.83%	1.39%	1.81% - 2.10%
Weighted-average grant date fair value	$5.55	$4.73	$3.69

Schedule of Other Share-based Compensation, Activity

Below is a summary of the restricted stock activity in the Plans for the years ended December 31, 2016:

	2016
	Shares		Weighted Average Grant-Date Fair Value per share
Unvested at the beginning of the year	60,000		$	15.46
Granted	340,825		24.30
Vested	(16,666	)	15.16
Forfeited	(13,825	)	17.60
Unvested at the end of the year	370,334		$	23.53