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Consolidated Statements of Comprehensive Income (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Amounts recognized in net periodic benefit cost, income tax expense $ 93 $ 85 $ 410 $ 256
Amounts recognized in interest expense, income tax benefit $ 8 $ 8 $ 24 $ 24