Leases - Narrative (Time Chart-Out and Charter-In) (Details)				1 Months Ended
	Feb. 28, 2023 $ / d	Sep. 06, 2021 t $ / d	Oct. 17, 2018 t $ / d	Mar. 31, 2023 vessel t $ / d	Mar. 31, 2022 $ / d	Dec. 31, 2019 $ / d
Lessee, Lease, Description [Line Items]
Number of vessels charted-in | vessel				5
Dead weight tonnage of operating fleet | t				3,210,000
2016 Built Ultramax Vessel
Lessee, Lease, Description [Line Items]
Dead weight tonnage of operating fleet | t			62,487
Charters agreement term			2 years
2016 Built Ultramax Vessel | First Year
Lessee, Lease, Description [Line Items]
Vessel hiring rate (in dollars per day)			14,250		23,888	11,600
2016 Built Ultramax Vessel | Second Year
Lessee, Lease, Description [Line Items]
Vessel hiring rate (in dollars per day)	25,888		15,250	17,500	25,888
2016 Built Ultramax Vessel | Additional Year Option
Lessee, Lease, Description [Line Items]
Vessel hiring rate (in dollars per day)						12,600
2016 Built Ultramax Vessel | Third Year Option
Lessee, Lease, Description [Line Items]
Vessel hiring rate (in dollars per day)				19,500
2021 Built Ultramax Vessel
Lessee, Lease, Description [Line Items]
Dead weight tonnage of operating fleet | t		64,539
Charters agreement term		12 months		12 months
2021 Built Ultramax Vessel | Twelve To Fifteen Month Option
Lessee, Lease, Description [Line Items]
Vessel hiring rate (in dollars per day)		11,250
Vessel hire rate (usd per day)		57.50%
2021 Built Ultramax Vessel | Additional Year Option
Lessee, Lease, Description [Line Items]
Vessel hiring rate (in dollars per day)		10,750
Vessel hire rate (usd per day)		57.50%
2021 Built Ultramax Vessel | Second Optional Year
Lessee, Lease, Description [Line Items]
Vessel hiring rate (in dollars per day)				8,500
Vessel hire rate (usd per day)				57.50%
2021 Built Ultramax Vessel | Third Year Option
Lessee, Lease, Description [Line Items]
Vessel hiring rate (in dollars per day)				9,500
Vessel hire rate (usd per day)				57.50%
2021 Built Ultramax Vessel | Three Month Option
Lessee, Lease, Description [Line Items]
Charters agreement term		3 months