EARNINGS PER SHARE (Tables)

9 Months Ended

Sep. 30, 2012

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings per share computations

The following is a reconciliation of basic and diluted earnings per share computations (in thousands except for per share amounts):

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2012		2011		2012		2011
Numerator for basic and diluted earnings per share:
Net Income	$	12,359	$	37,133	$	67,800	$	89,019
Denominator:
Basic shares outstanding	53,374		53,023		53,303		52,921
Dilutive effect of equity-based compensation awards	191		347		216		377
Dilutive shares outstanding	53,565		53,370		53,519		53,298
Basic earnings per share:	$	0.23	$	0.70	$	1.27	$	1.68
Diluted earnings per share:	$	0.23	$	0.70	$	1.27	$	1.67