Derivative Instruments and Hedging Activity (Details) - USD ($) $ in Millions	1 Months Ended				3 Months Ended	12 Months Ended
	Sep. 30, 2017	Jul. 31, 2014	Sep. 30, 2013	Apr. 30, 2012	Mar. 31, 2019	Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Description of Interest Rate Cash Flow Hedge Activities			the Company receives from the counterparty interest on the notional amount based on one month LIBOR and pays to the counterparty a fixed rate of 2.20%.
Derivative, Net Liability Position, Aggregate Fair Value					$ 2.5
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred					0.4
Interest Rate Swap Agreement One [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount				$ 22.3	18.4
Derivative, Inception Date			Oct. 03, 2013	Jul. 01, 2013
Derivative, Maturity Date			Sep. 29, 2020	May 01, 2019
Description of Interest Rate Cash Flow Hedge Activities				the Company receives from the counterparty interest on the notional amount based on one month LIBOR and pays to the counterparty a fixed rate of 1.92%.
Fixed interest rate				1.92%
Derivative, Amount of Hedged Item				$ 22.3
Interest Rate Swap Agreement Two [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount			$ 35.0
Derivative, Inception Date	Aug. 01, 2016
Derivative, Maturity Date	Jul. 01, 2023
Fixed interest rate			2.20%
Derivative, Amount of Hedged Item			$ 35.0
Fair Value, Net Asset (Liability)					0.1
Interest Rate Swap Agreement Three [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount		$ 65.0
Derivative, Inception Date		Jul. 21, 2014
Derivative, Maturity Date		Jul. 21, 2021
Description of Interest Rate Cash Flow Hedge Activities		the Company receives from the counterparty interest on the notional amount based on one month LIBOR and pays to the counterparty a fixed rate of 2.09%.
Fixed interest rate		2.09%
Derivative, Amount of Hedged Item		$ 65.0
Fair Value, Net Asset (Liability)					0.2
Interest Rate Swap Agreement Four [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Description of Interest Rate Cash Flow Hedge Activities	the Company receives from the counterparty interest on the notional amount based on one month LIBOR and pays to the counterparty a fixed rate of 1.40%.
Interest Rate Swap Agreement Five [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	$ 40.0
Fixed interest rate	1.40%
Derivative, Amount of Hedged Item	$ 40.0
Fair Value, Net Asset (Liability)					1.2
Interest Rate Swap Agreement Six [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount						$ 100.0
Derivative, Inception Date						Dec. 27, 2018
Derivative, Maturity Date						Jan. 15, 2026
Description of Interest Rate Cash Flow Hedge Activities						the Company receives from the counterparty interest on the notional amount based on one month LIBOR and pays to the counterparty a fixed rate of 2.66%
Fixed interest rate						2.66%
Derivative, Amount of Hedged Item						$ 100.0
Fair Value, Net Asset (Liability)						$ (3.0)
Interest Rate Swap Agreement Seven [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount					100.0
Fair Value, Net Asset (Liability)					$ (0.5)