Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements Of Shareholders' Equity (Parenthetical)

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Consolidated Statements Of Shareholders' Equity (Parenthetical) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 12 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Issuance of common stock from stock-based compensation awards, tax benefit, Value $ 14,926 $ 9,330