STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2014

STOCK-BASED COMPENSATION

Summary of restricted stock units, performance-based stock units, and weighted average grant date fair values

	Employee Service-Based Awards				Employee Performance-Based Awards				Director Awards
	Units		Weighted Average Grant Date Fair Value		Units		Weighted Average Grant Date Fair Value		Units		Weighted Average Grant Date Fair Value
Nonvested at December 31, 2011(As Restated)	650,655		$	21.99	226,701		$	21.00	112,331		$	21.33
Granted	335,750		20.26		147,300		21.09		63,497		22.35
Vested	(232,787	)	20.35		(89,622	)	19.49		(54,472	)	19.65
Forfeited	(95,051	)	21.80		(143,077	)	21.21		—		—
Nonvested at December 31, 2012(As Restated)	658,567		$	21.71	141,302		$	21.84	121,356		$	22.62
Granted	302,261		29.66		54,300		29.66		49,751		32.50
Vested	(218,160	)	21.60		(44,700	)	21.49		(85,246	)	23.08
Forfeited	(32,624	)	23.36		(22,625	)	29.66		(997	)	25.72
Nonvested at December 31, 2013(As Restated)	710,044		$	25.05	128,277		$	23.89	84,864		$	27.91
Granted	285,332		33.65		41,713		36.19		36,794		30.08
Vested	(280,933	)	23.66		(52,616	)	22.72		(43,512	)	27.82
Forfeited	(43,708	)	29.66		(41,713	)	36.19		(5,314	)	22.43
Nonvested at December 31, 2014	670,735		$	28.99	75,661		$	24.70	72,832		$	29.46

Summary of option activity and weighted average exercise prices

	Employee Awards					Director Awards
				Weighted Average					Weighted Average
Weighted Average Exercise Price	Shares			Exercise Price		Shares			Exercise Price
Outstanding at December 31, 2011	434,500			$	13.45	28,259			$	11.99
Granted	—			—		—			—
Terminated	(1,500		)	15.60		—			—
Exercised	(230,000		)	14.82		(9,404		)	16.04
Outstanding at December 31, 2012	203,000			$	11.88	18,855			$	10.02
Granted	—			—		—			—
Terminated	(3,000		)	12.10		—			—
Exercised	(200,000		)	11.88		(5,535		)	11.21
Outstanding at December 31, 2013	—			$	—	13,320			$	9.53
Granted	—			—		—			—
Terminated	—			—		—			—
Exercised	—			—		(5,373		)	16.10
Outstanding at December 31, 2014	—			$	—	7,947			$	5.09
Aggregate intrinsic value at December 31, 2014	$	—				$	40,450
Weighted average remaining contractual term (years)	—					0.4

Summary of information concerning outstanding and exercisable options

Information concerning outstanding and exercisable options as of December 31, 2014 is as follows:

	Options Outstanding and Exercisable
	Number of	Weighted Average
Range of	Options	Remaining	Exercise
Exercise Prices	or Awards	Life (Years)	Price
$5.09 to $5.09	7,947	0.4	$	5.09