Subsequent Events (Details)				1 Months Ended
	Jan. 31, 2019 USD ($)	Feb. 28, 2015 USD ($)	Feb. 05, 2015 USD ($)	Feb. 28, 2015 USD ($)
Revolving Credit Facility
Subsequent Event [Line Items]
Term		5 years	5 years
Maximum borrowing capacity		$ 170,000,000.0	$ 170,000,000.0	$ 170,000,000.0
Additional borrowing capacity		$ 80,000,000.0
Additional borrowing capacity, incremental amount				$ 20,000,000.0
Unused capacity, commitment fee percentage				0.25%
Fixed charge coverage ratio				0.0100
Minimum excess availability percentage of maximum revolver amount		10.00%		10.00%
Swing Line Sub Facility
Subsequent Event [Line Items]
Maximum borrowing capacity		$ 20,000,000.0		$ 20,000,000.0
New Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Unused capacity, commitment fee percentage	0.25%
Fixed charge coverage ratio	1.0
Minimum excess availability percentage of maximum revolver amount	10.00%
New Credit Facility | Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Term	5 years
Maximum borrowing capacity	$ 225,000,000.0
Additional borrowing capacity	75,000,000.0
Additional borrowing capacity, incremental amount	20,000,000.0
New Credit Facility | Letter of Credit | Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity	15,000,000.0
New Credit Facility | Swing Line Sub Facility | Subsequent Event
Subsequent Event [Line Items]
Maximum borrowing capacity	$ 25,000,000.0
New Credit Facility | Base Rate | Minimum | Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Basis spread on variable rate	0.25%
New Credit Facility | Base Rate | Maximum | Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Basis spread on variable rate	0.75%
New Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum | Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Basis spread on variable rate	1.25%
New Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum | Revolving Credit Facility | Subsequent Event
Subsequent Event [Line Items]
Basis spread on variable rate	1.75%