Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statement of Changes in Stockholders' Equity (Parenthetical)

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Consolidated Statement of Changes in Stockholders' Equity (Parenthetical) (USD $)
In Thousands, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Statement of Stockholders' Equity [Abstract]    
Excess tax benefits from stock-based compensation arrangements $ 2,496 $ 418