Other Liabilities (Details) - USD ($) $ in Thousands	Oct. 01, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Deferred compensation	$ 5,948	$ 5,247
Long-term income taxes payable	122	2,523
Asset retirement obligation	2,666	2,540
Post-retirement medical obligation	2,192	2,231
Long-term capital lease	0	575
Deferred service income-long term	1,053	49
Other	322	309
Balance, end of the period	$ 12,303	$ 13,474	[1]

[1] The balance sheet as of December 31, 2015 has been derived from the audited financial statements at that date.