Minimum liquid funds for the company to be allowed to pay dividends.

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The number of vessels.

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No definition available.

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- Definition

The number of units (items of property) under capital lease arrangements.

+ References

No definition available.

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The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (a)
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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cash
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-Section S99
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- Definition

Amount of assets pledged to secure a debt instrument.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (d)
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- Definition

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.

+ References

No definition available.

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- Definition

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.

+ References

No definition available.

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- Definition

Amount of commitment fees for the unused borrowing capacity under the long-term financing arrangement that is available to the entity.

+ References

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- Definition

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

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Carrying value as of the balance sheet date of current portion of long-term loans payable to bank due within one year or the operating cycle if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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-Name Regulation S-X (SX)
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-Section 02
-Paragraph 19, 20
-Article 5

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- Definition

Weighted average interest rate of long-term debt outstanding.

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No definition available.

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- Definition

The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against short-term borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. For a classified balance sheet represents the current portion only (the noncurrent portion has a separate concept); there is a separate and distinct element for unclassified presentations.

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Long-term Debt (Details) $ in Thousands	12 Months Ended
Long-term Debt (Details) $ in Thousands	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)
Long-term debt [Line Items]
Cash and cash equivalents	$ 208,056	$ 86,000	$ 53,548	$ 21,700
Restricted cash	3,769	3,352
Long term debt - current portion	$ 127,141	$ 88,317
Weighted average interest rate	3.69%	3.53%	3.34%
Unused credit facilities, commitment fee	$ 3,157	$ 637
Number of vessels	70
Loan reference interest rate	LIBOR
Write off of unamortized deferred financing fees	$ 974	652	$ 0
Company's Minimum Liquid Funds
Long-term debt [Line Items]
Liquid funds to be allowed to pay dividends	200,000
Minimum Liquid Funds per Vessel
Long-term debt [Line Items]
Liquid funds to be allowed to pay dividends	2,000
Not legally restricted
Long-term debt [Line Items]
Cash and cash equivalents	150,000	35,400
Legally restricted
Long-term debt [Line Items]
Restricted cash	13,997	13,972
Reclassification adjustment due to SCR shortfall
Long-term debt [Line Items]
Long term debt - current portion	$ 14,268
First-priority mortgage
Long-term debt [Line Items]
Number of vessels	61
Amount of vessels pledged as collateral	$ 1,559,339
Cross collateral, Bareboat vessels
Long-term debt [Line Items]
Capital leased assets, Number of vessels	4
Capital leased assets, Net book value	$ 121,010
Excel Vessel Bridge Facility
Long-term debt [Line Items]
Write off of unamortized deferred financing fees		$ 652
Excel Vessel Bridge Facility, Excel Vessel CiT Facility, ABN AMRO $31,000 Facility and Commerzbank 26,000 Facility
Long-term debt [Line Items]
Write off of unamortized deferred financing fees	$ 974