RESTATEMENT OF CONSOLIDATED FINANCIAL STATEMENTS (Cash Flows) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Oct. 01, 2016	Jul. 02, 2016	Apr. 02, 2016	Jan. 02, 2016	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 41,225	$ 34,808	$ 32,670	$ 17,396	$ 10,761	$ 32,925	$ 5,109	$ (340)	$ 126,099	$ 48,455	$ 51,912
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income taxes									(16,758)	(15,459)	(16,671)
Accounts Payable, accrued expenses and other current liabilities									63,425	32,692	(34,106)
Net cash provided by operating activities									136,310	68,407	87,875
As Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	36,576	30,811	29,041	15,583	10,329	31,785	5,089	(91)	112,011	47,112	50,639
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income taxes									(17,499)	(15,530)	(16,738)
Accounts Payable, accrued expenses and other current liabilities									78,254	34,106	(32,766)
Net cash provided by operating activities									136,310	68,407	87,875
Effect of Restatement
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Net income	$ 4,649	$ 3,997	$ 3,629	$ 1,813	$ 432	$ 1,140	$ 20	$ (249)	14,088	1,343	1,273
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred income taxes									741	71	67
Accounts Payable, accrued expenses and other current liabilities									(14,829)	(1,414)	(1,340)
Net cash provided by operating activities									$ 0	$ 0	$ 0