Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
REIT requirements and income tax information
Percentage of nondeductible excise tax the entity would be subject to if they fail to meet the minimum distributions requirement	4.00%
Uncertain tax positions	$ 0	$ 0
Number of taxable years an entity would not be able to qualify as a REIT if qualification lapses	4 years
Statutory federal income tax rate (as a percent)	21.00%	21.00%
Minimum
REIT requirements and income tax information
Percentage of taxable income distributed in the form of qualifying distributions	90.00%
Maximum
REIT requirements and income tax information
Percentage of taxable income distributed in the form of qualifying distributions	100.00%
Broadmark
REIT requirements and income tax information
Increase in deferred tax assets	$ 21,100
Federal
REIT requirements and income tax information
Net operating loss carryovers	40,600
Operating loss carryforwards subject to expiration	55,800
State
REIT requirements and income tax information
Net operating loss carryovers	123,100
Operating loss carryforwards subject to expiration	$ 132,600