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(Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Statement of Other Comprehensive Income [Abstract]      
Unrealized gain (loss) on investments, tax $ 1,018 $ 2,208 $ 5,683
Noncash Titan Europe Plc gain, tax 9,492 0 0
Pension liaiblity adjustments, tax $ 207 $ 4,583 $ 381