Number of repayment installments of a credit facility agreement.

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The number of tranches under the credit facility.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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States whether the entity was in compliance with the debt covenants throughout the reporting period, and describes facts and circumstances of any compliance failure.

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The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of payment greater than the preceding installment payments to be paid at final maturity date of debt.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Description of the relevant terms of the derivative. Includes the type of instrument, risk being hedged, notional amount, counterparty, inception date, maturity date, relevant interest rates, strike price, cap price, and floor price.

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Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Discussion of whether the borrowings under the credit facility are secured or unsecured and, if secured, a description of collateral (for example, accounts receivable less than 120 days old, finished goods inventory).

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Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

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Date the credit facility first became available, in CCYY-MM-DD format.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of the required periodic payments of both interest and principal.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Weighted average interest rate of long-term debt outstanding calculated at point in time.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as current. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

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Long-term Debt: (Details Narrative) $ in Thousands	3 Months Ended	6 Months Ended
Long-term Debt: (Details Narrative) $ in Thousands	Mar. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Line of Credit Facility [Line Items]
Loan reference interest rate		LIBOR
Repayments of debt		$ 169,229	$ 366,116
Cash and cash equivalents		77,506	$ 83,088	$ 117,819
Restricted cash		$ 29,094		7,422
Debt Instrument, Covenant Compliance		As of June 30, 2020, the Company was in compliance with the applicable financial and other covenants contained in its debt agreements, including the 2022 Notes.
Weighted average interest rate		4.13%	5.65%
Loss on debt extinguishment		$ 618	$ 1,619
8.30% 2022 Notes [Member]
Line of Credit Facility [Line Items]
Unamortized debt issuance costs		975		1,179
Long-term Debt [Member]
Line of Credit Facility [Line Items]
Unamortized debt issuance costs		16,500		15,098
Loss on debt extinguishment		24	115
Write off of Deferred Debt Issuance Cost			$ (80)
Cash and Cash Equivalents [Member]
Line of Credit Facility [Line Items]
Cash and cash equivalents		58,000		58,000
Legally restricted [Member]
Line of Credit Facility [Line Items]
Restricted cash		30,114		$ 8,443
Scrubber equipment [Member]
Line of Credit Facility [Line Items]
Remaining borrowing capacity		$ 0
DSF $55.0 Facility [Member]
Line of Credit Facility [Line Items]
Initiation date		Mar. 26, 2020
Maximum borrowing capacity		$ 55,000
Number of loan tranches		2
Vessels provided as collateral		The DSF $55,000 Facility is secured by a first priority mortgage on the two vessels.
Loan reference interest rate		US LIBOR
DSF $55.0 Facility [Member] \| Interest Rate Swap [Member]
Line of Credit Facility [Line Items]
Interest rate		0.581%
Derivative, Term of Contract		3 years
Initiation date		July 1, 2020.
DSF $55.0 Facility [Member] \| Tranche A [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 27,500
Amount drawn down	$ 27,500
Number of installments		10
Frequency of payments		semi-annual
Repayment installment		$ 1,058
Balloon installment		16,923
DSF $55.0 Facility [Member] \| Tranche B [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 27,500
Amount drawn down	$ 27,500
Number of installments		10
Frequency of payments		semi-annual
Repayment installment		$ 1,058
Balloon installment		16,923
HSBC Working Capital Facility [Member]
Line of Credit Facility [Line Items]
Amount drawn down		53,762
Repayments of debt		24,182
Atradius Facility [Member] \| Scrubber equipment [Member]
Line of Credit Facility [Line Items]
Amount drawn down		3,331
DNB $310,000 Facility [Member] \| Scrubber equipment [Member]
Line of Credit Facility [Line Items]
Amount drawn down		18,798
SEB Facility [Member] \| Scrubber equipment [Member]
Line of Credit Facility [Line Items]
Amount drawn down		$ 1,260