STOCKHOLDERS' EQUITY (Narrative) (Details) - USD ($)		1 Months Ended		2 Months Ended	12 Months Ended
	May 18, 2016	Dec. 31, 2018	Jul. 31, 2016	Dec. 31, 2018	Dec. 30, 2018	Dec. 31, 2017	Dec. 25, 2016	Oct. 31, 2018	Feb. 10, 2016	Jul. 28, 2015
Noncontrolling Interest [Line Items]
Share repurchase, authorized amount								$ 200,000,000.0	$ 300,000,000.0	$ 150,000,000.0
Shares repurchased under program (in shares)				15,600
Market value of shares repurchased under program				$ 200,000	$ 236,000	$ 14,641,000	$ 117,884,000
Special cash dividends	$ 700,000,000
Special cash dividends paid (in dollars per share)	$ 2.75
Capital contributions to subsidiary by noncontrolling participants		$ 1,400,000	$ 7,300,000		$ 1,421,000		$ 7,252,000
Consolidation, eliminations
Noncontrolling Interest [Line Items]
Additional capital contributed to subsidiary		$ 600,000	$ 2,700,000