Income Taxes (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Current	$ 624,000	$ 1,313,000	$ 930,000
Deferred	876,000	709,000	374,000
Income tax expense	1,500,000	2,022,000	1,304,000
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Provision at U.S. statutory rate	1,264,000	1,734,000	1,109,000
State taxes, net of federal benefit	182,000	217,000	182,000
Permanent differences, primarily meals and entertainment	250,000	304,000	198,000
Domestic production activities deduction	(63,000)	(113,000)	(98,000)
Tax credits	(133,000)	(120,000)	(87,000)
Deferred Tax Assets, Gross [Abstract]
Net operating losses and alternative minimum tax credit carryforwards	372,000	364,000
Accrued salaries and severance	1,396,000	1,150,000
Other	1,208,000	1,153,000
Deferred tax assets, Gross	2,976,000	2,667,000
Deferred Tax Liabilities, Gross [Abstract]
Property, equipment and leasehold improvements	(14,351,000)	(13,139,000)
Intangible assets	(6,153,000)	(6,240,000)
Other	(236,000)	(188,000)
Deferred tax liabilities, Gross	(20,740,000)	(19,567,000)
Deferred tax assets (liabilities), Net	(17,764,000)	(16,900,000)
Net Operating Loss And Alternative Minimum Tax Credit Carry Forwards [Abstract]
State NOLs, tax effected	30,000
Federal alternative minimum tax credit carryforwards	343,000
Unrecognized tax benefits	0	0
Changes to our unrecognized tax benefits within the next twelve months.	0
Federal
Income Tax Contingency [Line Items]
Current	491,000	1,079,000	746,000
Deferred	728,000	595,000	305,000
State
Income Tax Contingency [Line Items]
Current	133,000	234,000	184,000
Deferred	$ 148,000	$ 114,000	$ 69,000