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Long-Term Debt - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Debt Instrument [Line Items] |  |  |
Repayments of Long-term Debt | $ 359.0 |  |
Line of Credit Facility, Maximum Borrowing Capacity | 550.0 |  |
Gain (Loss) on Extinguishment of Debt | 11.0 | $ 0.0 |
Redemption Premium | 9.0 |  |
Write off of Deferred Debt Issuance Cost | $ 2.0 |  |
Debt Instrument, Redemption Price, Percentage | 102.438% |  |
Revolving Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross | $ 0.0 |  | $ 0.0
Revolving Credit Facility [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.30% |  |
Revolving Credit Facility [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage | 0.60% |  |
Revolving Credit Facility [Member] | Amended Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Capitalization Ratio, Maximum | 57.50% |  |
Debt Covenant, Consolidated Net Worth | $ 475.0 |  |
Debt Covenant, Consolidated Net Worth, Add On For Consolidated Net Income After Deductions, Percent | 70.00% |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 200.0 |  |
Revolving Credit Facility [Member] | Amended Credit Facility [Member] | Base Rate [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 1.125% |  |
Revolving Credit Facility [Member] | Amended Credit Facility [Member] | Base Rate [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 2.25% |  |
Revolving Credit Facility [Member] | Amended Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 2.125% |  |
Revolving Credit Facility [Member] | Amended Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 3.25% |  |
Revolving Credit Facility [Member] | Amended Credit Facility, A Loan [Member] | Base Rate [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 0.875% |  |
Revolving Credit Facility [Member] | Amended Credit Facility, A Loan [Member] | Base Rate [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 2.00% |  |
Revolving Credit Facility [Member] | Amended Credit Facility, A Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 1.875% |  |
Revolving Credit Facility [Member] | Amended Credit Facility, A Loan [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Line of Credit Facility, Interest Rate During Period | 3.00% |  |
Amended Credit Facility, A Loan [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term Debt, Fair Value | $ 350.0 |  |
Senior Notes [Member] | Senior unsecured notes, maturing 2024 [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross | 0.0 |  | 350.0
Senior Notes [Member] | Senior unsecured notes, maturing 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Long-term debt, gross | $ 350.0 |  | $ 0.0
Debt Instrument, Interest Rate, Stated Percentage | 3.625% |  |

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- Definition Debt Covenant, Consolidated Net Worth, Add On For Consolidated Net Income After Deductions, Percent + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Percentage price of original principal amount of debt at which debt can be redeemed by the issuer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph e -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition The effective interest rate during the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition The excess of the (1) fair value of consideration transferred to the holders of a security in excess of (2) the carrying amount of the security reported on the registrant's balance sheet, which will be deducted from net earnings to derive net earnings available to common shareholders. This amount is generally an adjustment considered in the computation of earnings per share. + References No definition available. + Details
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- Definition The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585 + Details
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