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Consolidated Statements Of Operations And Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Consolidated Statements Of Operations And Comprehensive Income    
Net unrealized gain on available-for-sale securities tax expense $ 695 $ 695
Net unrealized loss on derivative benefit $ 108 $ 108