Long-term Debt, Line of Credit and Derivatives - Financial covenants (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019 USD ($)
Debt Instrument [Line Items]
Covenant compliance, Fixed Charge Coverage Ratio, minimum		1.25
Covenant compliance, Leverage Ratio, maximum		4.00
Covenant compliance, EBITDA, minimum		$ 21.7
Scenario, Forecast
Debt Instrument [Line Items]
Covenant compliance, Leverage Ratio, maximum	3.00