Debt - 5.250% Senior Unsecured Notes due 2025 (Details) - 5.250% senior unsecured notes due 2025 - USD ($)		12 Months Ended
Feb. 13, 2017	Dec. 31, 2019
Debt Instrument [Line Items]
Stated interest rate		5.25%
Senior Notes
Debt Instrument [Line Items]
Gross proceeds from note issuance	$ 450,000,000.0
Stated interest rate		5.25%
Proceeds from debt issuance, net	$ 444,100,000
Maximum percent of aggregate principal amount redeemable		35.00%
Redemption price, expressed as percentage of principal amount		105.25%
Minimum required principal amount to remain outstanding subsequent to redemption		65.00%
Number of days within closing date redemption can occur		120 days
Senior Notes \| Debt Instrument, Redemption, Period Five
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount		100.00%
Senior Notes \| Debt Instrument, Redemption, Period One
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount		103.938%
Senior Notes \| Debt Instrument, Redemption, Period Two
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount		102.625%
Senior Notes \| Debt Instrument, Redemption, Period Three
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount		101.313%
Senior Notes \| Debt Instrument, Redemption, Period Four
Debt Instrument [Line Items]
Redemption price, expressed as percentage of principal amount		100.00%

Debt instrument redemption minimum required principal amount to remain outstanding subsequent to redemption.

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- Definition

Debt instrument redemption price maximum percentage of principal amount redeemable.

+ References

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Debt instrument redemption requirement period of redemption within closing date.

+ References

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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Contractual interest rate for funds borrowed, under the debt agreement.

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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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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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