Basis of Presentation and General Information (Details) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2022 USD ($) vessel bank segment t $ / shares	Jun. 30, 2021 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares	Mar. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($)	May 04, 2018 t
Property, Plant and Equipment [Line Items]
Number of business segments | segment	1
Number of vessels | vessel	53
Dead weight tonnage of operating fleet | t	3,190,000
Average age of operating fleet	9 years 6 months
Common stock, par value (in dollars per share) | $ / shares	$ 0.01		$ 0.01
Net proceeds from issuance of stock		$ 27,100
Stockholders' equity attributable to parent	$ 693,769		$ 671,266	$ 480,896	$ 470,418
Convertible Debt | Convertible Bond Debt
Property, Plant and Equipment [Line Items]
Debt discount	969		13,165
Additional paid-in capital
Property, Plant and Equipment [Line Items]
Stockholders' equity attributable to parent	961,930		982,746	943,600	943,572
Accumulated deficit
Property, Plant and Equipment [Line Items]
Stockholders' equity attributable to parent	$ (278,858)		(313,495)	$ (462,289)	$ (472,138)
Cumulative Effect, Period of Adoption, Adjustment
Property, Plant and Equipment [Line Items]
Stockholders' equity attributable to parent			(12,050)
Cumulative Effect, Period of Adoption, Adjustment | Additional paid-in capital
Property, Plant and Equipment [Line Items]
Stockholders' equity attributable to parent			(20,726)
Cumulative Effect, Period of Adoption, Adjustment | Accumulated deficit
Property, Plant and Equipment [Line Items]
Stockholders' equity attributable to parent			8,676
Accounting Standards Update 2020-06 | Convertible Debt | Convertible Bond Debt
Property, Plant and Equipment [Line Items]
Debt discount			(12,000)
Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption, Adjustment | Additional paid-in capital
Property, Plant and Equipment [Line Items]
Stockholders' equity attributable to parent			(20,700)
Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption, Adjustment | Accumulated deficit
Property, Plant and Equipment [Line Items]
Stockholders' equity attributable to parent			$ 8,700
ATM Offering
Property, Plant and Equipment [Line Items]
Common stock, par value (in dollars per share) | $ / shares				$ 0.01
Consideration authorized				$ 50,000
Shares issued (in shares) | shares		581,385
Weighted-average sales price (in dollars per share) | $ / shares		$ 47.97
2013 Built Ultramax Vessel
Property, Plant and Equipment [Line Items]
Dead weight tonnage of operating fleet | t						61,425
Number of vessels charted-in | vessel	4
Remaining lease term	1 year
Supramax Vessels
Property, Plant and Equipment [Line Items]
Vessels in operation | bank	27
Ultramax Vessels
Property, Plant and Equipment [Line Items]
Vessels in operation | bank	26