Accounting Policies (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2017	Sep. 30, 2016	Sep. 29, 2017	Sep. 30, 2016
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interests	$ 561	$ 1,012	$ 2,046	$ 689
C H S Home Health
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interests	699		2,518
Imperium
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interests	108	(1,060)	381	(724)
Other
Noncontrolling Interest [Line Items]
Net income attributable to noncontrolling interests	$ (30)	$ (48)	$ (91)	$ (35)