Organization and Summary of Accounting Policies - Carrying Amount and Fair Value of Long-Term Debt (Details) - Senior Notes - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
6.750% senior unsecured notes due 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	6.75%
Long-term debt	$ 370.0	$ 370.0
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
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	$ 268.7	368.2
10.000% senior unsecured notes due 2027
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Stated interest rate	10.00%
Long-term debt	$ 430.0	430.0
10.000% senior unsecured notes due 2027 | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	430.0	430.0
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	309.6	471.4
Revolving Credit Facility | Senior secured term loan | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	1,430.6	1,434.1
Revolving Credit Facility | Senior secured term loan | Fair Value | Fair Value, Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,130.2	$ 1,434.1