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Derivative Instruments and Hedging Activity (Details) - USD ($) $ in Millions | 1 Months Ended | 9 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 31, 2020 | Oct. 31, 2019 | May 31, 2019 | Dec. 31, 2018 | Sep. 30, 2017 | Jul. 31, 2014 | Sep. 30, 2020 | Dec. 31, 2019 | 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 |  |  |  |  |  |  | $ (6.7) |  |  |  |
Derivative, Net Liability Position, Aggregate Fair Value |  |  |  |  |  |  | $ 18.8 |  |  |  |
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. 12, 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) |  |  |  |  |  |  | $ (1.5) |  |  |  |
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 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 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 |  |  |  |  |
Derivative, Inception Date |  |  |  |  |  | Jul. 21, 2014 |  |  |  |  |
Derivative, Maturity Date |  |  |  |  |  | Jul. 21, 2021 |  |  |  |  |
Fair Value, Net Asset (Liability) |  |  |  |  |  |  | (1.0) |  |  |  |
Interest Rate Swap Agreement, in September 2017 [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 one 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) |  |  |  |  |  |  | (1.4) |  |  |  |
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 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 |  |  |  |  |  |  |
Derivative, Inception Date |  |  |  | Dec. 27, 2018 |  |  |  |  |  |  |
Derivative, Maturity Date |  |  |  | Jan. 15, 2026 |  |  |  |  |  |  |
Fair Value, Net Asset (Liability) |  |  |  |  |  |  | (12.5) |  |  |  |
Agreement in August 2020 [Member] |  |  |  |  |  |  |  |  |  |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |  |  |  |  |  |  |  |  |  |
Derivative, Notional Amount | $ 100.0 |  |  |  |  |  |  |  |  |  |
Fair Value, Net Asset (Liability) |  |  |  |  |  |  | $ 0.3 |  |  |  |

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- Definition The estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121549185&loc=d3e80845-113994 + Details
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