Basic And Diluted Net Income Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

The following sets forth the computation of basic and diluted net income (loss) per share:

	Years Ended December 31,
In thousands, except per share amounts	2013			2012		2011
Numerator:
Net income (loss)	$	(13,769	)	$	47,187	$	39,230
Denominator:
Basic weighted-average shares outstanding	28,106			26,881		25,915
Effect of dilutive employee stock options and restricted stock units	—			824		863
Diluted weighted-average shares outstanding	28,106			27,705		26,778
Net income (loss) per share—basic	$	(0.49	)	$	1.76	$	1.51
Net income (loss) per share—diluted	$	(0.49	)	$	1.70	$	1.47