Leases - Narrative (Time Chart-Out and Charter-In) (Details) $ in Thousands						1 Months Ended			12 Months Ended
	Sep. 06, 2021 t $ / d	Dec. 22, 2020 t $ / d	Oct. 17, 2018 t $ / d	May 04, 2018 t $ / d	Apr. 28, 2017 t $ / d	May 31, 2022	Mar. 31, 2022 $ / d	Dec. 31, 2019 $ / d	Dec. 31, 2022 USD ($) t	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Dead weight tonnage of operating fleet | t									3,200,000
Impairment of operating lease right-of-use assets | $									$ 2,212	$ 0	$ 352
Minimum
Lessee, Lease, Description [Line Items]
Term of contract					1600 days				30 days
Term of charter agreement	12 months
Maximum
Lessee, Lease, Description [Line Items]
Term of charter agreement	3 months
Time Charter-Out Contracts | Minimum
Lessee, Lease, Description [Line Items]
Term of contract									30 days
Time Charter-Out Contracts | Maximum
Lessee, Lease, Description [Line Items]
Term of contract									2 years
2013 Built Japanese Vessel
Lessee, Lease, Description [Line Items]
Dead weight tonnage of operating fleet | t					61,400
Charters agreement extension option					2 years
2013 Built Japanese Vessel | First Year
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)					12,800
2013 Built Japanese Vessel | First Optional Year
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)					13,800
2013 Built Japanese Vessel | Second Optional Year
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)					14,300
Ultramax Vessels
Lessee, Lease, Description [Line Items]
Dead weight tonnage of operating fleet | t				61,425
Charters agreement extension option					2 years
Term of charter agreement				3 years
Ultramax Vessels | First Optional Year
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)				13,750
Ultramax Vessels | Second Optional Year
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)				14,750
Ultramax Vessels | First Three Years
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)				12,700
2016 Built Ultramax Vessel
Lessee, Lease, Description [Line Items]
Dead weight tonnage of operating fleet | t			62,487
Term of charter agreement			2 years
2016 Built Ultramax Vessel | First Year
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)			14,250				23,888	11,600
2016 Built Ultramax Vessel | Second Year
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)			15,250				25,888
2016 Built Ultramax Vessel | Additional Year Option
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)								12,600
2021 Built Ultramax Vessel
Lessee, Lease, Description [Line Items]
Dead weight tonnage of operating fleet | t	64,539	63,634
Charters agreement extension option		3 months
Term of charter agreement		12 months
2021 Built Ultramax Vessel | Additional Year Option
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)	10,750
2021 Built Ultramax Vessel | Twelve Month Option
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)		5,900
Amount of Baltic Supermax Index added to hiring rate		57.00%
2021 Built Ultramax Vessel | Three Month Option
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)		6,500
Shares scrubber benefit		50.00%
2021 Built Ultramax Vessel | Eleven To Thirteen Month Option
Lessee, Lease, Description [Line Items]
Amount of Baltic Supermax Index added to hiring rate		57.00%
2021 Built Ultramax Vessel | Twelve to Fifteen Month Option
Lessee, Lease, Description [Line Items]
Vessel hire rate (usd per day)	11,250
Amount of Baltic Supermax Index added to hiring rate	57.50%
2021 Built Ultramax Vessel | Minimum
Lessee, Lease, Description [Line Items]
Charters agreement extension option		11 years				11 months
2021 Built Ultramax Vessel | Maximum
Lessee, Lease, Description [Line Items]
Charters agreement extension option		13 months				13 months