Computation of Net Earnings (Loss) per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Computation of Net Earnings (Loss) per Share
Net income (loss) available to common stockholders (in dollars)	$ 174	$ (8,988)
Weighted average common shares outstanding used in computing basic net earnings (loss) per share	110,649,000	108,227,000
Incremental options, RSUs and restricted stock	5,149,000
Weighted average common shares outstanding used in computing diluted net earnings (loss) per share	115,798,000	108,227,000
Net earnings (loss) per share
Basic (in dollars per share)	$ 0.00	$ (0.08)
Diluted (in dollars per share)	$ 0.00	$ (0.08)
Incremental shares excluded from the calculation of net loss per share (in shares)		2,103,634