Maren consolidation at stabilization (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Mar. 31, 2021
Land	$ 135,139	$ 123,397
Project under construction	11,149	8,668
Accounts receivable	1,423	793
Assets	677,040	678,190
Long-term Debt	178,483	178,409
Other liabilities	1,886	1,886
Equity – FRP	397,802	396,423
Total Liabilities and Capital	$ 677,040	$ 678,190
Riverfront Holdings I I L L C [Member]
Land			$ 29,330
Building and improvements, net			110,800
Project under construction			258
Value of leases in place			4,750
Cash			3,704
Cash held in escrow			336
Accounts receivable			707
Prepaid expenses			197
Assets			150,082
Long-term Debt			88,000
Amortizable debt costs			(1,072)
Other liabilities			441
Equity – FRP			44,200
Equity - MRP			18,513
Total Liabilities and Capital			150,082
Riverfront Holdings I I L L C [Member]
Land			6,472
Building and improvements, net			87,269
Project under construction			258
Value of leases in place			0
Cash			3,704
Cash held in escrow			336
Accounts receivable			707
Prepaid expenses			197
Assets			98,943
Long-term Debt			88,000
Amortizable debt costs			(1,072)
Other liabilities			441
Equity – FRP			7,026
Equity - MRP			4,548
Total Liabilities and Capital			98,943
Remeasurement Gain [Member]
Land			22,858
Building and improvements, net			23,531
Project under construction			0
Value of leases in place			4,750
Cash			0
Cash held in escrow			0
Accounts receivable			0
Prepaid expenses			0
Assets			51,139
Long-term Debt			0
Amortizable debt costs			0
Other liabilities			0
Equity – FRP			37,174
Equity - MRP			13,965
Total Liabilities and Capital			$ 51,139