Debt: Notes Payable (Details) - Notes Payable, Other Payables - Prudential Investment Management, Inc	6 Months Ended
	Jul. 01, 2017 USD ($)
Notes Payable
Notes payable amount	$ 25,000,000
Term of notes payable	10 years
Interest	5.50%
Quarterly principal payment, first five years	$ 500,000
Quarterly principal payment, thereafter	750,000
Minimum prepayment	1,000,000
Notes Payable, Carrying Value	$ 21,000,000