Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Comprehensive Income (Parenthetical)

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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Condensed Consolidated Statements of Comprehensive Income [Abstract]    
Unrealized holding gains arising during period, tax $ 1,172 $ 2,062
Reclassification adjustment for (gains) losses included in net income, tax $ 0 $ 1