Earnings per Share (Tables)

12 Months Ended

Dec. 31, 2012

Earnings per Share [Abstract]

Basic and Diluted Weighted Average Shares Outstanding and Earnings per Share

	Year Ended December 31,
	2012		2011		2010
	(in thousands, except per share data)
Income (numerator):
Net income (loss)	$	58,810	$	26,611	$	(8,468)
Net income attributable to participating securities		(455)		(77)		-
Net income (loss) attributable to common shares	$	58,355	$	26,534	$	(8,468)
Weighted average shares (denominator):
Weighted average shares—basic		38,885		39,946		40,064
Dilutive effect of stock options		149		104		-
Weighted average shares—diluted		39,034		40,050		40,064
Basic earnings (loss) per share	$	1.50	$	0.66	$	(0.21)
Diluted earnings (loss) per share	$	1.50	$	0.66	$	(0.21)

Number of Antidilutive Shares Excluded from the Computation of Dilutive Weighted Average Shares

	Year Ended December 31,
	2012		2011		2010
	(in thousands)
Weighted average shares		687		442		409