Capitalization Ratio, Maximum

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- Definition

Debt Covenant, Consolidated Net Worth

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- Definition

Debt Covenant, Consolidated Net Worth, Add On For Consolidated Net Income After Deductions, Percent

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No definition available.

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- Definition

Debt Instrument, Change In Control, Repurchase Price Percentage

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- Definition

Holders Of Aggregate Principal Amount Required To Accelerate Amounts Due, Percent

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No definition available.

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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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The effective interest rate during the reporting period.

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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.

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

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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

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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.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Long-Term Debt - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Repayments of Long-term Debt	$ 350.0	$ 3.0	$ 350.0	$ 3.0
Line of Credit Facility, Maximum Borrowing Capacity	(550.0)		(550.0)
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 0.0		$ 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%		57.50%
Debt Covenant, Consolidated Net Worth	$ 475.0		$ 475.0
Debt Covenant, Consolidated Net Worth, Add On For Consolidated Net Income After Deductions, Percent	70.00%		70.00%
Line of Credit Facility, Maximum Borrowing Capacity	$ 200.0		$ 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		350.0
Senior Notes [Member] \| Senior unsecured notes, maturing 2024 [Member]
Debt Instrument [Line Items]
Long-term debt, gross	$ 350.0		$ 350.0		$ 350.0
Debt Instrument, Change In Control, Repurchase Price Percentage				101.00%
Holders Of Aggregate Principal Amount Required To Accelerate Amounts Due, Percent				25.00%