Long-Term Debt and Credit Facility - Credit Facility (Details) - USD ($)		9 Months Ended	12 Months Ended
	Mar. 02, 2015	Sep. 30, 2015	Dec. 31, 2014	May. 10, 2013
Line of Credit Facility [Line Items]
Credit facility, financial covenant, fixed charge coverage ratio		1.10
Fixed charge coverage ratio calculation, maximum impairment and stock compensation expense excluded from adjusted EBITDA		$ 23,000,000
Fixed charge coverage ratio calculation, excluded amount of unfunded capital expenditures in 2015		7,500,000
Fixed charge coverage ratio calculation, excluded amount of unfunded capital expenditures in 2016		$ 5,000,000
Credit facility, financial covenant, funded debt to adjusted EBITDA ratio		4.0
Annual limit on capital expenditures		$ 35,000,000
Covenant, percent of adjusted EBITDA which must be prepaid		25.00%
Credit facility ceiling value applicable to 25% of adjusting EBITDA which must be paid		$ 3,000,000
Covenant, maximum number of days from year end by which prepayment of 25% of adjusted EBITDA is due		60 days
Excess cash flow minimum achieved under loan covenant			$ 3,000,000
Amount borrowed		$ 47,768,000	44,041,000
Line of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		75,000,000.0
Credit facility, availability		67,600,000
Credit facility, available borrowing capacity, net of outstanding borrowings		$ 47,000,000
Credit facility, commitment fee percentage		0.25%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Amount borrowed		$ 20,584,000	8,500,000
Letter of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		10,000,000
Term loan [Member]
Line of Credit Facility [Line Items]
Debt, face amount				$ 50,000,000.0
Amount paid on term loan due to covenant requirement	$ 3,000,000
Monthly principal payments		600,000
Amount borrowed		$ 27,184,000	$ 35,541,000
PNC Bank Base Rate [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Base lending rate		3.25%
Credit facility, amount outstanding		$ 1,600,000
Credit facility, interest rate at period end		3.75%
PNC Bank Base Rate [Member] | Term loan [Member]
Line of Credit Facility [Line Items]
Amount borrowed		$ 200,000
Debt, interest rate at period end		4.50%
LIBOR [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, amount outstanding		$ 19,000,000
Credit facility, interest rate at period end		1.70%
LIBOR [Member] | Term loan [Member]
Line of Credit Facility [Line Items]
Amount borrowed		$ 27,000,000
Debt, interest rate at period end		2.45%
Minimum [Member] | PNC Bank Base Rate [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, variable percentage rate spread		0.50%
Minimum [Member] | PNC Bank Base Rate [Member] | Term loan [Member]
Line of Credit Facility [Line Items]
Credit facility, variable percentage rate spread		1.25%
Minimum [Member] | LIBOR [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, variable percentage rate spread		1.50%
Minimum [Member] | LIBOR [Member] | Term loan [Member]
Line of Credit Facility [Line Items]
Credit facility, variable percentage rate spread		2.25%
Maximum [Member] | PNC Bank Base Rate [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, variable percentage rate spread		1.00%
Maximum [Member] | PNC Bank Base Rate [Member] | Term loan [Member]
Line of Credit Facility [Line Items]
Credit facility, variable percentage rate spread		1.75%
Maximum [Member] | LIBOR [Member] | Line of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility, variable percentage rate spread		2.00%
Maximum [Member] | LIBOR [Member] | Term loan [Member]
Line of Credit Facility [Line Items]
Credit facility, variable percentage rate spread		2.75%