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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
CONSOLIDATED BALANCE SHEETS
Accounts receivable - trade, allowance (in dollars)	$ 1,505	$ 1,138
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares issued	42,114,630	41,977,725
Common stock, shares outstanding	42,114,630	41,977,725

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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