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Organization and Summary of Accounting Policies - Carrying Amount and Fair Value of Long-Term Debt (Details) - USD ($) $ in Millions	Jun. 30, 2021	May 03, 2021	Dec. 31, 2020
Secured Debt | Senior secured term loan | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,538.2		$ 1,539.4
Secured Debt | Senior secured term loan | Fair Value | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,530.5		1,533.4
Senior Notes | 6.750% senior unsecured notes due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (percent)	6.75%	6.75%
Senior Notes | 6.750% senior unsecured notes due 2025 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 370.0		370.0
Senior Notes | 6.750% senior unsecured notes due 2025 | Fair Value | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 374.2		376.0
Senior Notes | 10.000% senior unsecured notes due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate (percent)	10.00%
Senior Notes | 10.000% senior unsecured notes due 2027 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 545.0		545.0
Senior Notes | 10.000% senior unsecured notes due 2027 | Fair Value | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 596.1		$ 596.8

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Contractual interest rate for funds borrowed, under the debt agreement.

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