STOCK-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2016

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

Summary of total number, weighted-average grant-date fair value, and types of awards granted

The following table summarizes information about restricted stock awards for the three months ended March 31, 2016:

Restricted Stock	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at January 1, 2016	362,618		$	55.79
Granted	43,771		$	43.87
Vested	(85,388	)	$	55.79
Forfeited	(15,346	)	$	57.20
Balance at March 31, 2016	305,655		$	54.01

Summary of performance stock awards

The following table summarizes information about performance stock awards for the three months ended March 31, 2016:

Performance Stock	Number of Shares		Weighted Average Grant-Date Fair Value
Balance at January 1, 2016	187,274		$	57.13
Vested	(8,420	)	$	61.90
Forfeited	(10,191	)	$	57.65
Balance at March 31, 2016	168,663		$	56.86