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Summary of Significant Accounting Policies - Narrative (Details) $ in Millions				12 Months Ended
	Mar. 09, 2023	Feb. 22, 2023	Jan. 15, 2022 USD ($)	Dec. 31, 2023 segment shares	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2021	Apr. 27, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Reverse stock split (in shares)	0.25	0.25
Residential mortgage loans, past due period				30 days
Residential mortgage loans, delinquency period				90 days
Reportable segment | segment				1
Performance Shares | 2017 Plan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Award vesting period				3 years	3 years	3 years	3 years
RSUs | 2017 Plan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Award vesting period				3 years
Number of shares per vested RSU (in shares) | shares				1
Senior Notes Due 2026
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate									5.75%
6.25% senior convertible notes due 2022 | Convertible Notes
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate								6.25%
Extinguishment of debt, amount | $			$ 138.0
Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finite-lived intangible asset, useful life				5 months
Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finite-lived intangible asset, useful life				10 years
Building
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, plant and equipment useful life				30 years
Building Improvements | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, plant and equipment useful life				10 years
Building Improvements | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, plant and equipment useful life				30 years
Furniture and Fixtures | Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, plant and equipment useful life				5 years
Furniture and Fixtures | Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Property, plant and equipment useful life				7 years 6 months

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