Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Consolidated Balance Sheets [Abstract]
Accounts and other receivable, allowance for doubtful accounts and sales returns	$ 3,060	$ 5,286
Common stock, no par value
Common stock, shares issued	32,018,725	31,883,173
Common stock, shares outstanding	32,018,725	31,883,173

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Issuance value per share of no-par value common stock; generally not indicative of the fair market value per share.

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