Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000081362 (http://www.sec.gov/CIK)

Other Assets [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Other Assets [Abstract]
Schedule of Other Assets, Noncurrent [Table Text Block]	2016 2015 Restricted insurance settlement $ 21,883 $ 22,874 Uncertain tax positions 3,892 6,054 Supplemental retirement income program 1,410 1,336 Other 1,567 1,954 Total other assets $ 28,752 $ 32,218