Long-Term Debt and Capital Lease Obligations (Details Textual) - USD ($)	1 Months Ended	3 Months Ended
	Jun. 30, 2016	Mar. 30, 2017	Mar. 31, 2016	Dec. 29, 2016	Feb. 28, 2013
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		$ 45,510,000
Commitment Minimum Lease Payments		6,163,000
Payments Obligation Reduced Amount		5,636,000
Repayments of Long-term Capital Lease Obligations		255,000	$ 0
Digital Systems [Member]
Finite-Lived Intangible Assets, Accumulated Amortization		29,838,000		28,294,000
Furniture and Fixtures [Member]
Repayments of Long-term Capital Lease Obligations		775,000
Capital Leased Assets, Gross		1,712,000		1,712,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation		71,000
Building and Building Improvements [Member]
Capital Leased Assets, Gross		15,799,000		$ 15,799,000
Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation		460,000
Unsecured Senior Notes [Member]
Debt Instrument, Face Amount		$ 50,000,000
Debt Instrument, Interest Rate, Stated Percentage		4.32%
Interest Rate Swap [Member]
Derivative, Fixed Interest Rate					0.96%
Derivative, Variable Interest Rate		1.00%
Decrease In Interest Expense		$ 40,000
Mortgage Notes [Member]
Notes Payable, Total		$ 24,226,000
Debt Instrument, Basis Spread on Variable Rate		2.75%
Debt Instrument, Face Amount		$ 15,000,000
Debt Instrument, Interest Rate, Basis for Effective Rate		LIBOR plus 2.75%
Debt Instrument, Interest Rate, Effective Percentage		3.75%