Taxes (Detail) - USD ($)	3 Months Ended				9 Months Ended
	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Oct. 04, 2015	Oct. 02, 2016	Oct. 04, 2015	Dec. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by operating activities					$ 106,658,000	$ 83,995,000
Net cash provided by (used in) financing activities					$ (14,948,000)	$ (111,048,000)
Proceeds and Excess Tax Benefit from Share-based Compensation	$ 6,038,000	$ 745,000	$ 463,000
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions		$ 104,000		$ 993,000
provision for effective tax rate on continuing operations					18.00%
Effective Income Tax Rate Reconciliation, Percent	5.00%			12.00%	11.00%	15.00%
Effective Income Tax Rate Reconciliation, Percent						17.00%
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions	$ 543,000			$ 112,000
Effective Income Tax Rate Reconciliation, Write-Down of Deferred Tax Asset				65,000
Decrease in tax expense from expiration of statues of limitations	893,000		$ 364,000	$ 611,000
Increase in reserves for income taxes, net of deferred tax benefit	281,000				$ 281,000
Interest and penalties included in reserve					47,000
Liability for uncertain tax positions	6,131,000				6,131,000
Reserve for income taxes classified as a noncurrent iability	5,104,000				5,104,000		$ 4,830,000
Reserve for income taxes classified an noncurrent deferred tax assets	1,027,000				1,027,000
Interest and penalties, gross	$ 610,000				610,000
Minimum decrease in income tax expense due to release in reserves					950,000
Maximum decrease in income tax expense due to release in reserves					$ 1,050,000
Tax years open to examination by Internal Revenue Service					2013 through 2015
Tax years open to examination by various taxing authorities for other entities					2012 through 2015
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net cash provided by operating activities						$ 9,937,000
Net cash provided by (used in) financing activities						$ (9,937,000)
Accounting Standards Update 2015-17 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred income tax assets, current							7,104,000
Deferred income tax liabilities, current							$ 319,000