Long-term Debt, Line of Credit and Derivatives - Financial covenants (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Debt Instrument [Line Items]
Covenant compliance, leverage ratio minimum				9.50
Covenant compliance, EBITDA, minimum				$ 4.5
Scenario, Forecast
Debt Instrument [Line Items]
Covenant compliance, fixed charge coverage ratio, minimum		1.25
Covenant compliance, leverage ratio minimum	3.00	4.00	6.25
Covenant compliance, EBITDA, minimum		$ 21.7	$ 9.9