EMPLOYEE BENEFITS (Tables)

12 Months Ended

Dec. 31, 2017

Employee Benefits and Share-based Compensation [Abstract]

Schedule of assumptions used to determine fair value of time-based options

The fair value of time‑based options granted during 2017 and 2016 was estimated using the following assumptions:

	2017	2016
Expected term (years)	6.5	6.5
Risk-free interest rate	1.98% - 2.02%	1.33% - 1.84%
Expected volatility	31.02% - 34.39%	36.02% - 36.84%
Dividend yield	—	—

Summary of changes in outstanding time-based stock options

A summary of changes in outstanding time‑based stock options as of December 31, 2017 and 2016, is as follows:

	Number of Options		Weighted- Average Exercise Price		Average Remaining Contractual Term (In Years)
Shares under option—December 31, 2016	894,015		$	9.66	5.9
Shares granted	82,000		17.54
Shares forfeited or expired	(42,361	)	10.39
Shares exercised	(50,773	)	9.70
Shares under option—December 31, 2017	882,881		10.36		5.4
Shares exercisable—December 31, 2017	497,868		9.14		2.9
Shares under option—December 31, 2015	1,081,901		$	9.82	3.9
Shares granted	237,500		9.51
Shares forfeited or expired	(111,926	)	10.33
Shares exercised	(313,460	)	9.72
Shares under option—December 31, 2016	894,015		9.66		5.9
Shares exercisable—December 31, 2016	493,241		8.79		3.3

Summary of the status of nonvested time-based options

A summary of the status of the Company’s nonvested time‑based options as of December 31, 2017 and 2016, is presented below:

	Number of Options		Average Grant-Date Fair Value
Nonvested options—December 31, 2016	400,774		$4.86
Shares granted	82,000		6.65
Shares forfeited	(42,361	)	5.03
Shares vested	(55,400	)	6.06
Nonvested options—December 31, 2017	385,013		$5.05
Nonvested options—December 31, 2015	209,260		$6.21
Shares granted	237,500		3.65
Shares forfeited	(21,500	)	6.36
Shares vested	(24,486	)	3.35
Nonvested options—December 31, 2016	400,774		$4.86