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INVESTMENTS (Details)						1 Months Ended	12 Months Ended
INVESTMENTS (Details)	Mar. 09, 2017 USD ($) shares	Dec. 21, 2016 item	Dec. 26, 2013 USD ($)	Oct. 14, 2010 USD ($)	Feb. 13, 2007 $ / shares shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2016 USD ($) item $ / shares shares	Dec. 31, 2015 USD ($) shares	Dec. 31, 2014 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2014 USD ($)	Mar. 31, 2013 USD ($)	Aug. 30, 2012 USD ($)
Investments
Consideration received for spin-off								$ 76,101,000	$ 2,137,000
Assets held for sale						$ 5,390,000	$ 70,377,000	5,390,000
Equity Method Investments Ownership Transactions [Abstract]
Amortizable intangible asset						150,571,000	245,316,000	150,571,000
NCM tax receivable agreement
Equity Method Investments Ownership Transactions [Abstract]
Amortizable intangible asset						20,900,000	20,900,000	20,900,000
Theatre Partnerships
Investments
Amounts due to affiliate						2,897,000	1,796,000	2,897,000
National CineMedia Inc. [Member] \| NCM tax receivable agreement
Equity Method Investments Ownership Transactions [Abstract]
Amortizable intangible asset													$ 20,900,000
National CineMedia Inc. [Member] \| Investment Income (Expense) [Member] \| NCM tax receivable agreement
Equity Method Investments Ownership Transactions [Abstract]
Receipt under tax receivable agreement							$ 7,789,000	6,555,000	$ 8,730,000
NCM LLC
Investments
Ownership percentage			4.00%				17.40%
Assets held for sale							$ 44,577,000
Excess of recorded investment over proportional ownership of underlying equity							$ 731,374,000
Equity Method Investments Ownership Transactions [Abstract]
Gain (loss) on exchange and investment in NCM, Inc.						0
Number of units owned (in shares) \| shares							23,862,988
Estimated fair market value of the units						$ 69,289,000	$ 354,448,000	$ 69,289,000		$ 6,812,000	$ 2,137,000
NCM LLC \| Tranche 2 Investments
Equity Method Investments Ownership Transactions [Abstract]
Estimated fair market value of the units												$ 26,315,000
Open Road Releasing, LLC, Operator of ORF
Investments
Ownership percentage							50.00%
All Investees Except Those Specifically Excluded [Member]
Investments
Excess of recorded investment over proportional ownership of underlying equity							$ (15,022,000)
DCM
Investments
Ownership percentage							50.00%
SV Holdco
Investments
Ownership percentage							16.80%
Equity Method Investments Ownership Transactions [Abstract]
Earnings participation threshold				$ 85,000,000			$ 68,075,000
Maximum forfeiture of membership units, as a percent							25.00%
Maximum bonus in membership units, as a percent							33.00%
SV Holdco \| Class A Units
Investments
Ownership percentage							0.70%
Equity Method Investments Ownership Transactions [Abstract]
Fair value of investment							$ 1,156,000
SV Holdco \| Class C Units
Investments
Ownership percentage							16.10%
Equity Method Investments Ownership Transactions [Abstract]
Fair value of investment							$ 9,797,000
SV Holdco \| Significant Unobservable Inputs (Level 3)
Equity Method Investments Ownership Transactions [Abstract]
Fair value of investment							$ 11,291,000
AC JV, LLC
Investments
Ownership percentage							32.00%
AC JV, LLC \| Founding Members
Investments
Ownership percentage			32.00%
Consideration received for spin-off			$ 25,000,000
DCIP
Investments
Ownership percentage							29.00%
Real D Inc.
Equity Method Investments Ownership Transactions [Abstract]
Number of shares divested by owner \| shares							1,222,780
Gain on divestment of equity method investment							$ 3,008,000
Theatre Partnerships
Investments
Ownership percentage							50.00%
Number of theatres \| item							5
Number of screens \| item							1
DCDC
Investments
Ownership percentage							14.60%
Theatres Divested as Required by US DOJ
Investments
Number of theatres \| item		24
Number of screens \| item		384
Theatres Divested as Required by US DOJ \| Forecast
Investments
Total common units received \| shares	18,400,000
Common units returned under waiver of exclusivity agreement \| shares	1,800,000
Value of common units returned under waiver of exclusivity agreement	$ 25,000,000
Net common units received \| shares	13,750,000
Value of net common units received	$ 175,038,000
Expenses	$ 1,000,000
National CineMedia Inc. [Member]
Equity Method Investments Ownership Transactions [Abstract]
Number of shares issued \| shares					42,000,000
Price per share (in dollars per share) \| $ / shares					$ 21.00		$ 14.73
Common stock, shares issued (in shares) \| shares						200,000		200,000
National CineMedia Inc. [Member] \| Founding Members
Equity Method Investments Ownership Transactions [Abstract]
Payment to the Founding Members as a percentage of actual tax benefit realized from the tax amortization of the intangible assets by related party							90.00%
Minimum \| NCM LLC
Equity Method Investments Ownership Transactions [Abstract]
Percentage change in the total annual attendance of all the founding members required to cause an earlier common unit adjustment							2.00%
Maximum \| Other Noncurrent Assets [Member]
Investments
Ownership percentage							50.00%
Maximum \| NCM LLC \| December 20, 2017
Investments
Ownership percentage							15.00%
Maximum \| NCM LLC \| December 20, 2018
Investments
Ownership percentage							7.50%
Maximum \| NCM LLC \| June 20, 2019
Investments
Ownership percentage							4.99%