INVESTMENTS (National Cinemedia - Narrative) (Details) $ / shares in Units, shares in Millions		12 Months Ended
	Feb. 13, 2007 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) Y $ / digital_screen $ / patron shares	Jan. 01, 2015 USD ($) $ / digital_screen	Dec. 26, 2013 USD ($) $ / shares	Dec. 27, 2012 USD ($)
Schedule of Equity Method Investments [Line Items]
Carrying value of Company's investment		$ 321,800,000
Change in total attendance (as a percent)		2.00%
National Cine Media
Schedule of Equity Method Investments [Line Items]
Common units held (in shares) | shares		26.4
Carrying value of Company's investment	$ 0	$ 157,400,000	$ 157,400,000	$ 158,500,000	$ 73,900,000
Extended term of the exhibitor services agreement (in years)		30 years
Period covered under right of first refusal (in years)		5 years
ESA, right of first refusal commencement period (in years)		1 year
Fixed theatre access fees per patron (in dollars per patron) | $ / patron		0.0756
Fixed theatre access fees per patron increase (as a percent)		8.00%
Fixed theatre access fees per patron fixed period (in years)		5 years
Fixed theatre access fees per digital screen (in dollars per digital projection system) | $ / digital_screen		800
Fixed theatre access fees per digital screen increase (as a percent)		5.00%
Fixed theatre access fees per digital screen, current fixed (in dollars per digital projection system) | $ / digital_screen			1,182
Fixed theatre access fees per digital screen, additional fixed payment | $ / digital_screen			608
Aggregate theatre access fee as a percentage of aggregate advertising revenue (as a percent)		12.00%
Payment received for ESA modification	$ 281,000,000
Amortization period (in years)		30 years
Due from related parties		$ 2,800,000	$ 2,700,000
Due to related parties		$ 1,300,000	$ 1,500,000
National Cine Media Inc
Schedule of Equity Method Investments [Line Items]
Issue price (in dollars per share) | $ / shares				$ 17.79
National Cine Media Inc | National Cine Media
Schedule of Equity Method Investments [Line Items]
Cash payments to be made for realized tax benefit (as a percent)		90.00%
Tax receivable agreement period | Y		30
National Cine Media Inc | IPO
Schedule of Equity Method Investments [Line Items]
Shares of common stock issued (in shares) | shares	38.0
Issue price (in dollars per share) | $ / shares	$ 21
Other Affiliates | National Cine Media Inc | IPO
Schedule of Equity Method Investments [Line Items]
Shares of common stock issued (in shares) | shares	4.0
Capital Unit, Class A | National Cine Media
Schedule of Equity Method Investments [Line Items]
Common units held (in shares) | shares	21.2
Common units to common shares redemption basis	1
Carrying value of Company's investment	$ 0
Capital Unit, Class B | National Cine Media
Schedule of Equity Method Investments [Line Items]
Cumulative number of shares issued for all transactions (in shares) | shares		11.8