STOCK-BASED COMPENSATION (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock option activity

The following table summarizes the stock option activity during the year ended December 31, 2015 for all grants under the Equity Compensation Plan:

	Options		Weighted Average Exercise Price
Outstanding at January 1, 2015	384,435		$	10.52
Granted	—		—
Exercised	(367,935	)	10.33
Forfeited	—		—
Cancelled	—		—
Outstanding at December 31, 2015	16,500		14.83
Vested and expected to vest	16,500		14.83
Exercisable at December 31, 2015	16,500		$	14.83

Summary of stock options outstanding and exercisable by price range

A summary of stock options outstanding and exercisable by price range at December 31, 2015 is as follows (in thousands, except share and per share data):

	Outstanding and Exercisable
	Number of Options Outstanding at December 31,	Weighted Average Remaining Contractual	Weighted Average Exercise		Aggregate Intrinsic
Exercise Price	2015	Life (Years)	Price		Value (A)
$10.04-$12.70	1,750	1.5	$	11.78	$	75
$14.16-$14.39	10,500	0.3	$	14.38	$	421
$15.22-$18.34	4,250	1.5	$	17.21	$	158
Total	16,500	0.88	$	14.83	$	654

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(A) The difference between the stock option’s exercise price and the closing price of the common stock at December 31, 2015.

Restricted stock and units activity

The following table summarizes the activity related to restricted stock unit ("RSU") share based payment awards:

	Number of Shares		Weighted- Average Grant-Date Fair Value
Unvested, January 1, 2015	213,113		$	32.94
Granted	91,811		41.09
Vested	(138,926	)	32.93
Forfeited	(1,324	)	33.54
Unvested, December 31, 2015	164,674		$	37.49

The following table summarizes the activity related to restricted stock award ("RSA") share based payment awards:

	Number of Shares		Weighted- Average Grant-Date Fair Value
Unvested, January 1, 2015	186,471		$	24.47
Granted	770,205		43.49
Vested	(169,352	)	22.82
Forfeited	—		—
Unvested, December 31, 2015	787,324		$	43.43

Schedule of nonvested performance-based units activity

The following table summarizes the activity related to performance unit awards ("PSU") share based payment awards:

	Number of Shares		Weighted- Average Grant-Date Fair Value
Unvested, January 1, 2015	71,868		$	39.42
Granted	32,632		35.98
Vested	(35,776	)	32.56
Forfeited	—		—
Unvested, December 31, 2015	68,724		$	34.63