Annual report pursuant to Section 13 and 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
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Condensed Consolidated Statements of Comprehensive Income [Abstract]      
Unrealized holding gains arising during period, tax $ 405 $ 4,346 $ 345
Reclassification adjustment for (gains) losses included in net income, tax $ 67 $ 179 $ 20