Long-Term Debt and Capital Lease Obligations (Details Textual) - USD ($)	1 Months Ended		7 Months Ended	12 Months Ended
	Jan. 31, 2017	Jun. 30, 2016	Dec. 31, 2015	Dec. 29, 2016	Dec. 31, 2015	May 28, 2015	May 29, 2014	Feb. 28, 2013
Debt Instrument, Periodic Payment, Total				$ 39,110
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate				5.75%
Debt, Weighted Average Interest Rate			4.59%	4.70%	4.59%
Senior Notes, Noncurrent			$ 101,429,000	$ 90,286,000	$ 101,429,000
Long-term Commercial Paper, Total				$ 35,000,000
Line of Credit Facility, Commitment Fee Percentage				0.20%
Line of Credit Facility, Remaining Borrowing Capacity				$ 85,000,000
Interest Paid, Net			5,220,000	9,105,000		$ 9,353,000	$ 9,370,000
Derivative, Amount of Hedged Item								$ 25,000,000
Derivative Liability, Notional Amount				$ 25,000,000
Derivative Instruments Loss Reclassified From Accumulated Income Effective Portion Net Of Tax		$ 96,000
Derivative Instruments, Loss Reclassified from Accumulated OCI into Income, Effective Portion		159,000
Term Of Licensing Agreement				10 years
Capital Leases, Balance Sheet, Assets by Major Class, Net				$ 45,510,000
Commitment Minimum Lease Payments				6,163,000
Payments Obligation Reduced Amount				$ 5,543,000
Expect Period Of Payments Obligation				12 months
Repayments of Long-term Capital Lease Obligations				$ 146,000
Wehrenberg Theatres [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Capital Lease Obligation				17,511,000
Digital Systems [Member]
Finite-Lived Intangible Assets, Accumulated Amortization			$ 22,118,000	$ 28,294,000	$ 22,118,000
Senior Notes [Member]
Long-term Debt, Weighted Average Interest Rate			5.26%	5.10%	5.26%
Unsecured Senior Notes [Member] | Subsequent Event [Member]
Debt Instrument, Face Amount	$ 50,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.32%
Minimum [Member] | Senior Notes [Member]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate				4.02%
Maximum [Member] | Senior Notes [Member]
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate				6.55%
Revolving Credit Facility [Member]
Long-term Line of Credit			$ 175,000,000	$ 140,000,000	$ 175,000,000
Line of Credit Facility, Commitment Fee Percentage				1.83%	1.61%
Credit Agreement [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 225,000,000
Interest Rate Swap [Member]
Derivative, Fixed Interest Rate								0.96%
Derivative, Variable Interest Rate				0.75%
Decrease In Interest Expense		$ 165,000
Term Loan [Member]
Line of Credit Facility, Decrease, Forgiveness				$ 37,188,000
Mortgage Notes [Member]
Notes Payable, Total				$ 24,226,000
Mortgage Notes [Member] | Subsequent Event [Member]
Debt Instrument, Face Amount	$ 15,000,000
Debt Instrument, Description of Variable Rate Basis	LIBOR plus 2.75%
Mortgage Notes [Member] | Minimum [Member]
Interest Rate Of Unsecured Term Note				3.00%
Mortgage Notes [Member] | Maximum [Member]
Interest Rate Of Unsecured Term Note				5.90%