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Gain on Sale of Assets and Other Income (Expense) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Other income (expense) $ 2,531 $ 117 $ 191
Loss on disposition of assets 0 0 (75)
Other income (expense), net $ 2,531 $ 117 $ 116