v2.4.0.6

Consolidated Balance Sheet (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | ---
Allowance for doubtful accounts receivable, current | $ 5,891 | $ 5,683
Redeemable preferred stock, par value | $ 0.1 | $ 0.1
Redeemable preferred stock, shares authorized | 20,000,000 | 20,000,000
Redeemable preferred stock, shares issued | 6,111,000 | 6,361,000
Redeemable preferred stock, shares outstanding | 6,111,000 | 6,361,000
Mandatory redemption and aggregate liquidation value, redeemable preferred stock | $ 305,550 | $ 318,050
Common stock, par value | $ 0.01 | $ 0.01
Common stock, shares authorized | 600,000,000 | 600,000,000
Common stock, shares issued | 284,449,372 | 290,826,284
Common stock, shares outstanding | 284,449,372 | 290,826,284

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