Unaudited Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Accounts receivable, non-trade	$ 15,968	$ 12,305
Accounts receivable, related party balance	31,873	65,936
Accumulated depreciation on vessels and equipment	3,107,437	2,894,097
Accumulated amortization on vessels under capital lease	$ 61,087	$ 56,316
Common stock, par value (usd per share)	$ 0.001	$ 0.001
Common stock, share authorized	725,000,000	725,000,000
Common stock, share issued	84,832,824	72,711,371
Common stock, share outstanding	84,832,824	72,711,371
Minimum [Member]
Range of interest	0.00%	0.00%
Maximum [Member]
Range of interest	3.00%	3.00%

Loans receivables from affiliate interest rate stated percentage.

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Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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The sum of amounts currently receivable other than from customers. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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