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INCOME TAXES INCOME TAXES - Income Tax Reconciliation (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 25, 2015	Sep. 25, 2015	Jun. 26, 2015	Mar. 27, 2015	Dec. 26, 2014	Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 25, 2015	Dec. 26, 2014	Dec. 27, 2013
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income tax expense based on statutory rate									$ 33,745	$ 28,641	$ 21,328
Increase (decrease) resulting from:
State income taxes, net of federal benefit									4,175	3,213	2,536
Tax credits, net									(14,483)	(18,564)	(10,790)
Non-deductible/non-taxable items									2,456	1,983	2,124
Foreign taxes									(933)	1,037	488
Other, net									240	(141)	327
Income Tax Expense (Benefit)	$ 4,696	$ 12,796	$ 6,235	$ 1,473	$ 4,472	$ 8,243	$ 2,350	$ 1,104	$ 25,200	$ 16,169	$ 16,013
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation, Adjustments to Statutory Income Tax Rate [Abstract]
Income tax expense based on statutory rate									35.00%	35.00%	35.00%
Increase (decrease) resulting from:
State income taxes, net of federal benefit									4.30%	3.90%	4.20%
Tax credits, net									(15.00%)	(22.60%)	(17.70%)
Non-deductible/non-taxable items									2.50%	2.40%	3.50%
Foreign taxes									(1.00%)	1.30%	0.80%
Other, net									0.30%	(0.20%)	0.50%
Total taxes on income									26.10%	19.80%	26.30%

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Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation, Adjustments to Statutory Income Tax [Abstract]

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