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Derivative Instruments and Hedging Activity (Details) - USD ($) $ in Millions	1 Months Ended							12 Months Ended
	Aug. 31, 2020	May 31, 2020	Oct. 31, 2019	Dec. 31, 2018	Jun. 30, 2016	Jul. 31, 2014	Sep. 30, 2013	Dec. 31, 2020	Feb. 29, 2020	Jun. 30, 2019	Mar. 31, 2019
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred								$ 6.5
Derivative, Net Liability Position, Aggregate Fair Value								16.2
Interest Rate Swap Agreement, in February 2020 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount									$ 100.0
Realized gain (loss) on settlement of interest rate swaps	$ (7.3)
Interest Rate Swap Agreement In August 2020 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount	100.0
Fair Value, Net Asset (Liability)								2.3
Interest Rate Swap Agreement In December 2020 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount								100.0
Fair Value, Net Asset (Liability)								(0.2)
Interest Rate Swap Agreement, in September 2013 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount							$ 35.0
Description of Interest Rate Cash Flow Hedge Activities							the Company received from the counterparty interest on the notional amount based on 1 month LIBOR and paid to the counterparty a fixed rate of 2.20%
Fixed interest rate							2.20%
Derivative, Amount of Hedged Item							$ 35.0
Derivative, Inception Date							Oct. 03, 2013
Derivative, Maturity Date							Sep. 29, 2020
Interest Rate Swap Agreement, in July 2014 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount						$ 65.0
Description of Interest Rate Cash Flow Hedge Activities						the Company receives from the counterparty interest on the notional amount based on 1 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
Derivative, Inception Date						Jul. 21, 2014
Derivative, Maturity Date						Jul. 21, 2021
Fair Value, Net Asset (Liability)								(0.8)
Interest Rate Swap Agreement, in June 2016 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount					$ 40.0
Description of Interest Rate Cash Flow Hedge Activities					the Company receives from the counterparty interest on the notional amount based on 1 month LIBOR and pays to the counterparty a fixed rate of 1.40%
Fixed interest rate					1.40%
Derivative, Amount of Hedged Item					$ 40.0
Derivative, Inception Date					Aug. 01, 2016
Derivative, Maturity Date					Jul. 01, 2023
Fair Value, Net Asset (Liability)					$ (0.2)
Interest Rate Swap Agreement, in December 2018 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount				$ 100.0
Description of Interest Rate Cash Flow Hedge Activities				the Company receives from the counterparty interest on the notional amount based on 1 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
Derivative, Inception Date				Dec. 27, 2018
Derivative, Maturity Date				Jan. 15, 2026
Fair Value, Net Asset (Liability)								(11.5)
Interest Rate Swap Agreement, in March 2019 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount											$ 100.0
Realized gain (loss) on settlement of interest rate swaps		$ 0.8
Interest Rate Swap Agreement, in June 2019 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount										$ 100.0
Realized gain (loss) on settlement of interest rate swaps	$ (16.1)
Interest Rate Swap Agreement, Sixty-Five Million in October 2019 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount			$ 65.0
Description of Interest Rate Cash Flow Hedge Activities			the Company receives from the counterparty interest on the notional amount based on 1 month LIBOR and pays to the counterparty a fixed rate of 1.4275%
Fixed interest rate			1.4275%
Derivative, Amount of Hedged Item			$ 65.0
Derivative, Inception Date			Jul. 21, 2021
Derivative, Maturity Date			Jan. 12, 2024
Fair Value, Net Asset (Liability)								(2.0)
Interest Rate Swap Agreement, Thirty-Five Million in October 2019 [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Notional Amount			$ 35.0
Description of Interest Rate Cash Flow Hedge Activities			the Company receives from the counterparty interest on the notional amount based on 1 month LIBOR and pays to the counterparty a fixed rate of 1.4265%
Fixed interest rate			1.4265%
Derivative, Amount of Hedged Item			$ 35.0
Derivative, Inception Date			Sep. 29, 2020
Derivative, Maturity Date			Jan. 12, 2024
Fair Value, Net Asset (Liability)								$ (1.3)

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