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Long-Term Debt, Interest Rate Swap and Capitalized Lease Obligations - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands		12 Months Ended
	Feb. 26, 2016	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total		$ 73,630	$ 88,107
Less current portion		(12,449)	(13,065)
Long-term debt, excluding current maturities		61,181	75,042
Less deferred financing costs, net		(1,125)	(1,884)
Plus capitalized lease obligations		928	1,445
Long-term debt and capital lease obligation		60,984	74,603
Mortgage term loan \| Amended and restated credit agreement \| LIBOR
Debt Instrument [Line Items]
Long-term debt basis spread based on LIBOR	4.00%
Acquisition loan facility \| Amended and restated credit agreement \| LIBOR
Debt Instrument [Line Items]
Long-term debt basis spread based on LIBOR	4.75%
Equipment loan
Debt Instrument [Line Items]
Total		0	40
Mortgages \| Amended and restated credit agreement
Debt Instrument [Line Items]
Term mortgage loan facility		58,630
Mortgages \| Mortgage term loan \| Amended and restated credit agreement
Debt Instrument [Line Items]
Term mortgage loan facility		$ 51,730	64,567
Effective fixed interest rate percentage		5.79%
Mortgages \| Mortgage term loan \| Amended and restated credit agreement \| LIBOR
Debt Instrument [Line Items]
Long-term debt basis spread based on LIBOR		4.00%
Mortgages \| Acquisition loan facility \| Canadian Imperial Bank
Debt Instrument [Line Items]
Total		$ 6,900	7,500
Mortgages \| Acquisition loan facility \| Canadian Imperial Bank \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate		4.75%
Mortgages \| Acquisition loan facility \| Amended and restated credit agreement
Debt Instrument [Line Items]
Term mortgage loan facility		$ 6,900
Effective fixed interest rate percentage		7.25%
Amended revolver \| Amended and restated credit agreement
Debt Instrument [Line Items]
Total		$ 15,000	$ 16,000
Amended revolver \| Amended and restated credit agreement \| LIBOR
Debt Instrument [Line Items]
Long-term debt basis spread based on LIBOR		4.00%