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Note 4. Schedule of investment gains/losses (Details) - Consolidated - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2015
Sep. 24, 2014
Sep. 25, 2013
Gain on contributions to investment partnerships       $ 29,524 $ 182,746
Gross realized gains on sales       0 1
Other than temporary impairment       0 (570)
Investment gains (including contributions) $ 0 $ 0 $ 0 $ 29,524 $ 182,177