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
6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Issuance of common stock from stock-based compensation awards, tax benefit $ 14,172 $ 9,330