EQUITY INSTRUMENTS (Tables)

12 Months Ended

Dec. 31, 2017

Share Based Compensation [Abstract]

Schedule of Share-Based Compensation, Stock Options Activity

The following table summarizes the Company’s stock option activity for 2015, 2016 and 2017:

	Number of Shares			Weighted- Average Exercise Price Per Share		Weighted- Average Remaining Contractual Life (years)		Aggregate Intrinsic Value
Outstanding, January 1, 2015		892		$	9.97
Granted		194			19.82
Exercised		(335	)		9.50
Forfeited/expired		(25	)		16.54
Outstanding, December 31, 2015		726			12.60
Granted		140			20.94
Exercised		(286	)		9.65
Forfeited/expired		(3	)		20.94
Outstanding, December 31, 2016		577			16.04
Granted		0			0
Exercised		(271	)		15.76
Forfeited/expired		0			0
Outstanding, December 31, 2017		306		$	16.28		3.78	$	11,121
Exercisable at December 31, 2017		130		$	12.52		3.02	$	5,230
Vested and expected to vest at December 31, 2017		303		$	16.25		3.78	$	11,029

Schedule of Share-Based Compensation Stock Options Valuation Assumptions

The fair value of each stock option was estimated on the date of grant using the Black-Scholes option pricing model and the following weighted average assumptions:

	2016			2015
Expected dividend yield		3.29	%		3.48	%
Expected volatility		43.53	%		40.81	%
Risk-free interest rate		1.62	%		1.55	%
Expected life (in years)		4.50			4.42

Schedule of Share-Based Compensation, Restricted Stock Activity

The following table summarizes the restricted stock activity for 2015, 2016 and 2017:

	Number of Shares			Weighted- Average Grant-Date Fair Value		Aggregate Intrinsic Value
Nonvested, January 1, 2015		422		$	13.56
Granted		89			19.72
Vested		(183	)		11.30
Forfeited		(52	)		13.51
Nonvested, December 31, 2015		276			17.05
Granted		84			21.02
Vested		(139	)		12.40
Forfeited		(5	)		19.91
Nonvested, December 31, 2016		216			21.51
Granted		140			35.11
Vested		(120	)		14.93
Forfeited		(4	)		31.23
Nonvested, December 31, 2017		232		$	32.96	$	12,269

Schedule of Share-Based Compensation, Restricted Stock Unit Activity

The following table summarizes the restricted stock unit activity for 2015, 2016 and 2017:

	Number of Restricted Stock Units			Weighted- Average Grant-Date Fair Value		Aggregate Intrinsic Value
Nonvested, January 1, 2015		366		$	9.81
Granted		123			19.28
Performance factor adjustment		62			12.48
Vested		(237	)		8.64
Forfeited		(1	)		16.67
Nonvested, December 31, 2015		313			14.92
Granted		161			26.59
Vested		(190	)		12.54
Forfeited		(3	)		20.39
Nonvested, December 31, 2016		281			23.18
Granted		73			35.75
Performance factor adjustment		34			17.56
Vested		(155	)		18.92
Forfeited		(1	)		20.52
Nonvested, December 31, 2017		232		$	29.20	$	12,175