Related Party Transactions - Additional information (Details) $ in Millions	Aug. 31, 2021 USD ($)
Broadmark Private Reit Llc [Member]
Related Party Transaction [Line Items]
Payments to acquire mortgage notes receivable	$ 43.5

The cash outflow from the purchase of receivables arising from the mortgage note on real estate.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireMortgageNotesReceivable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration