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RESTATEMENT OF CONSOLIDATED FINANCIAL STATEMENTS (Cash Flows) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Mar. 31, 2018
Apr. 01, 2017
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Net income $ 36,313 $ 32,670 $ (33,215) $ 50,066
Adjustments to reconcile net income to net cash provided by operating activities:        
Deferred income taxes     22,823 4,872
Accounts payable, accrued expenses and other current liabilities     (9,793) 35,331
Net cash provided by operating activities     $ 57,073 42,978
As Previously Reported        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Net income   29,041   44,624
Adjustments to reconcile net income to net cash provided by operating activities:        
Deferred income taxes       4,638
Accounts payable, accrued expenses and other current liabilities       41,007
Net cash provided by operating activities       42,978
Effect of Restatement        
Error Corrections and Prior Period Adjustments Restatement [Line Items]        
Net income   $ 3,629   5,442
Adjustments to reconcile net income to net cash provided by operating activities:        
Deferred income taxes       234
Accounts payable, accrued expenses and other current liabilities       (5,676)
Net cash provided by operating activities       $ 0