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SHAREHOLDERS' EQUITY (Details) - USD ($)
$ / shares in Units, shares in Thousands
 3 Months Ended 12 Months Ended 74 Months Ended
Dec. 31, 2017
Oct. 01, 2017
Dec. 31, 2017
Jan. 01, 2017
Oct. 01, 2017
Sep. 15, 2017
Jul. 25, 2011
Class of Stock [Line Items]              
Stock repurchase program, authorized amount             $ 75,000,000.0
Treasury stock acquired, average cost per share (in usd per share) $ 27.90       $ 15.52    
Purchases and retirement of common stock     $ 36,680,000 $ 5,748,000      
Preferred stock, shares authorized (in shares) 20,000   20,000 20,000      
Common stock              
Class of Stock [Line Items]              
Stock repurchase program, authorized amount           $ 100,000,000  
Purchases and retirement of common stock (in shares)         4,800    
Purchases and retirement of common stock $ 7,300,000 $ 29,400,000          
Unvested restricted stock included in shares outstanding (in shares) 800   800 700