Income Taxes (Details) - USD ($)	12 Months Ended
	Jan. 01, 2016	Dec. 31, 2014	Dec. 31, 2013	Jan. 01, 2016	Dec. 31, 2014
Operating loss carry-forwards
Uncertain tax positions	$ 1,186,000	$ 1,186,000		$ 2,470,000	$ 1,186,000
Provision for income taxes
Federal - current	5,283,000	2,829,000	$ 3,557,000
State and local - current	1,359,000	1,182,000	364,000
Deferred	3,914,000	5,500,000	2,099,000
Income Tax Expense (Benefit), Total	$ 10,556,000	$ 9,511,000	$ 6,020,000
Reconciliation of the statutory to the effective rate
Tax provision using statutory rate (as a percent)	35.00%	35.00%	35.00%
State and local taxes, net of Federal benefit (as a percent)	4.40%	4.70%	5.70%
Valuation allowance (as a percent)	0.20%	1.00%	(0.60%)
Noncontrolling interest related	0.60%	0.40%	0.50%
Legal settlement related	(5.10%)	(0.10%)	1.30%
Effective Income Tax Rate Reconciliation, Percent, Total	35.10%	41.00%	41.90%
Increase in valuation allowance due to a change in expected realizability of deferred tax assets for states operating loss carry-forwards	$ 20,000
Deferred tax assets
Non-deductible reserves and allowances				12,855,000	9,853,000
Insurance accruals				3,431,000	3,174,000
Net operating loss carryforwards				4,550,000	1,484,000
Deferred tax assets, gross				20,836,000	14,511,000
Valuation allowance				(1,762,000)	(1,746,000)
Deferred tax assets				19,074,000	12,765,000
Deferred tax liabilities
Goodwill & intangibles				30,719,000	23,038,000
Accelerated depreciation				(1,449,000)	(1,007,000)
Deferred tax liabilities				(32,168,000)	(24,045,000)
Net deferred tax liabilities				(13,094,000)	(11,280,000)
Deferred tax (liabilities) assets are reflected in the accompanying balance sheet as:
Long-term liabilities				(13,094,000)	(11,280,000)
Net deferred tax liabilities				(13,094,000)	(11,280,000)
Book value of goodwill not deductible for tax purposes				113,200,000	$ 65,400,000
Changes in unrecognized tax benefits
Balance	1,186,000
Increases related to positions taken in the current year	1,284,000
Balance	$ 2,470,000	$ 1,186,000
State
Operating loss carry-forwards
Net operating loss carry-forwards				28,800,000
Valuation allowance				$ 28,400,000