Taxes (Detail) - USD ($)	3 Months Ended			6 Months Ended
	Jul. 05, 2015	Apr. 05, 2015	Jun. 29, 2014	Jul. 05, 2015	Jun. 29, 2014	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Decrease resulting from Prior period tax positions	$ 112,000	$ 364,000
Increase resulting from current period tax positions	$ 65,000
Effective income tax rate on continuing operations				18.00%	17.00%
Provision for effective tax rate	17.00%		15.00%	17.00%	16.00%
Decrease resulting from settlements with taxing authorities			$ 418,000
Increase (decrease) in income tax reserves				$ 9,000
APIC portion of decrease in income tax reserves				48,000
Tax expense portion of decrease in income tax reserves				39,000
Increase (decrease) in interest and penalties				32,000
Liability for uncertain tax positions	$ 5,631,000			5,631,000
Reserve for income taxes classified as a noncurrent iability	4,603,000			4,603,000		$ 4,623,000
Reserve for income taxes classified an noncurrent deferred tax assets	1,028,000			1,028,000
Interest and penalties, gross	$ 561,000			561,000
Reserve for income taxes to be recorded in additional paid in capital				616,000
Minimum decrease in income tax expense due to release in reserves				550,000
Maximum decrease in income tax expense due to release in reserves				$ 650,000
Tax years open to examination by Internal Revenue Service				2012 through 2014
Tax years open to examination by various taxing authorities				2011 through 2014
Tax years open to examination by various taxing authorities for other entities				2010 through 2014