Credit Facilities - Narrative (Details) $ in Millions		9 Months Ended
	Jan. 16, 2018 USD ($)	Jun. 30, 2018 USD ($)
Excess Cash Flows Greater Than Or Equal to 2.50
Line of Credit Facility [Line Items]
Percentage of excess cash flow for each year of funded indebtedness to EBDTA		75.00%
Excess Cash Flows Less Than 2.50 Greater Than 2.00
Line of Credit Facility [Line Items]
Percentage of excess cash flow for each year of funded indebtedness to EBDTA		50.00%
Term Loans
Line of Credit Facility [Line Items]
Fixed charge coverage ratio		0.0135
Ratio of debt to EBITDA at closing at thereafter		0.0299
Ratio of debt to EBDTA for the period through December 31, 2017		3.0
Ratio of debt to EBDTA for the period ending September 30, 2018 through maturity		0.025
Term Loans | Excess Cash Flows Greater Than Or Equal to 2.50
Line of Credit Facility [Line Items]
Ratio of funded indebtedness to adjusted EBDTA, actual		2.50
Line of Credit
Line of Credit Facility [Line Items]
Unused borrowing capacity		$ 8.7
Line of credit, maximum borrowing capacity		10.0
Letter of Credit
Line of Credit Facility [Line Items]
Line of credit, maximum borrowing capacity		$ 1.3
Term Loan with Fifth Third Bank | Term Loans
Line of Credit Facility [Line Items]
Excess cash flow payment of loan agreement	$ 2.9
Maximum | Term Loans | Excess Cash Flows Less Than 2.50 Greater Than 2.00
Line of Credit Facility [Line Items]
Ratio of funded indebtedness to adjusted EBDTA, actual		2.50
Minimum | Term Loans | Excess Cash Flows Less Than 2.50 Greater Than 2.00
Line of Credit Facility [Line Items]
Ratio of funded indebtedness to adjusted EBDTA, actual		2.0