Earnings Per Share (Schedule Of Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Earnings Per Share [Abstract]
Net income (loss) attributable to the Company	$ 31,293	$ (15,335)
Less: dividends and undistributed earnings allocated to unvested restricted stock units	92
Net earnings allocated to common stockholders	$ 31,201	$ (15,335)
Weighted-average shares	105,621,000	104,660,000
Dilutive employee stock options and restricted stock units	1,859,000
Denominator for diluted net income (loss) per share attributable to the Company's stockholders	107,480,000	104,660,000
Basic	$ 0.30	$ (0.15)
Diluted	$ 0.29	$ (0.15)
Stock options and RSUs	1,500,000
Potential dilutive shares of common stock		3,000,000