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Loans and Investments - Non-performing Loans (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2025 USD ($) loan	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) loan	Dec. 31, 2023 USD ($)
Loans and Investments
Number of loans | loan	719		776
Interest income recognized on nonaccrual loans	$ 4,500	$ 8,700
Loans and investments, allowance for credit losses	$ 240,937	$ 211,942	$ 238,967	$ 195,664
Six loans collateralized by a land development project
Loans and Investments
Number of loans with unpaid principal balance | loan	6
Unpaid principal balance on loans	$ 121,400
Five loans collateralized by a land development project
Loans and Investments
Number of loans with unpaid principal balance | loan	5
Unpaid principal balance on loans	$ 112,100
Weighted average accrual rate of interest (as a percent)	9.95%
Loans collateralized by a land development project
Loans and Investments
Loans and investments, allowance for credit losses	$ 71,400		$ 71,400
Non-performing loans
Loans and Investments
Number of loans | loan	23		26
Carrying value of loans	$ 454,300		$ 598,900
Loan loss reserves	35,300		23,800
Non-performing loans | Financial Asset, Greater Than 60 Days Past Due
Loans and Investments
Interest receivable	$ 0		$ 0

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Number of mortgage loans within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Subsection 29
-Paragraph Column G
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-Publisher SEC

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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
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Amount of interest income on financing receivable on nonaccrual status.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 946
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Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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Amount of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, written down.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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