Senior secured notes, convertible notes, and corporate debt, net (Details)		12 Months Ended
	Oct. 20, 2021 USD ($)	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) $ / shares shares	May 20, 2021 USD ($)	Aug. 09, 2017 USD ($)
Senior secured notes, Convertible notes, and Corporate debt
Total Senior secured notes, net		$ 345,127,000	$ 343,355,000
Total Corporate debt, net		764,908,000	662,665,000
Total Convertible notes, net			114,397,000
Total carrying amount of debt components		1,110,035,000
Contractual maturities of the Senior Secured Notes, Convertible Notes, and Corporate debt
2025		120,000,000
2026		760,884,000
2027		100,000,000
2028		110,000,000
Thereafter		36,250,000
Total contractual amounts		1,127,134,000
Unamortized deferred financing costs, discounts, and premiums, net		(17,099,000)
Total carrying amount of debt components		1,110,035,000
Maximum
Senior secured notes, Convertible notes, and Corporate debt
Debt notes available for sale under At Market Issuance Sales Agreement				$ 100,000,000.0
4.50% Senior Secured Notes Due 2026
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 350,000,000
Interest rate (as a percent)		4.50%
Unamortized deferred financing costs		$ (4,873,000)
Total Senior secured notes, net		$ 345,127,000
Convertible Notes
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value					$ 115,000,000.0
Principal amount of the notes to be redeemed (as a percent)		100.00%
Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature		30
Threshold period of specified consecutive trading days within which the common stock price, used in a calculation with with the conversion rate, the result of which must exceed the threshold percentage		5 days
Specified period of time used to calculate average closing market price of common stock to be used as a factor in determining potential trigger of conversion feature		10 days
Gross carrying value of convertible notes					112,700,000
Gross carrying value of the equity component					$ 2,300,000
Convertible Notes | Minimum
Senior secured notes, Convertible notes, and Corporate debt
Percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion		120.00%
Threshold number of specified trading days that common stock price to conversion price of convertible debt instruments must exceed threshold percentage within a specified consecutive trading period to trigger conversion feature		20
The threshold percentage that per share value of distributions exceeds the average market price which may trigger the conversion feature		10.00%
Convertible Notes | Maximum
Senior secured notes, Convertible notes, and Corporate debt
Threshold percentage of the trading price of the convertible debt instrument to the product of the conversion rate and the closing stock price during any five consecutive trading day period		98.00%
Corporate Debt
Senior secured notes, Convertible notes, and Corporate debt
Repurchase price percentage in the event of change of control		101.00%
Unamortized discount		$ (7,121,000)
Total Corporate debt, net		764,908,000
5.50% Senior Notes due 2028
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 110,000,000
Interest rate (as a percent)		5.50%
6.20% and 5.75% Senior Notes due 2026
Senior secured notes, Convertible notes, and Corporate debt
Proceeds from issuance of unsecured debt			5,300,000
Debt issuance related expenses			$ 100,000
Number of shares sold in At The Market debt offering | shares		0	215,300
6.20% Senior Notes due 2026
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 104,614,000
Interest rate (as a percent)		6.20%		6.20%
Debt notes price per share | $ / shares			$ 25.40
5.75% Senior Notes Due 2026
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 206,270,000
Interest rate (as a percent)		5.75%		5.75%
Debt notes price per share | $ / shares			$ 25.05
6.125% Senior Notes due 2025
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 120,000,000
Interest rate (as a percent)		6.125%
7.375% Senior Notes due in 2027
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 100,000,000
Interest rate (as a percent)		7.375%
5.00% Senior Notes due in 2026
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 100,000,000
Interest rate (as a percent)		5.00%
Junior Subordinated I-A Notes
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 15,000,000
Junior Subordinated I-A Notes | Three Month LIBOR
Senior secured notes, Convertible notes, and Corporate debt
Pricing, spread on variable (as a percent)		3.10%
Junior Subordinated I-B Notes
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value		$ 21,250,000
Unamortized deferred financing costs		$ (5,105,000)
Junior Subordinated I-B Notes | Three Month LIBOR
Senior secured notes, Convertible notes, and Corporate debt
Pricing, spread on variable (as a percent)		3.10%
ReadyCap Holdings | 4.50% Senior Secured Notes Due 2026
Senior secured notes, Convertible notes, and Corporate debt
Debt instrument, face value	$ 350,000,000.0
Interest rate (as a percent)	4.50%
Repurchase price percentage in the event of change of control	101.00%