Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts receivable, non-trade	$ 33,924	$ 15,623
Accounts receivable, related party balance	26,471	65,936
Accumulated depreciation	3,294,021	2,894,097
Accumulated amortization on vessels under capital lease	$ 69,072	$ 56,316
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, share authorized (shares)	725,000,000	725,000,000
Common stock, share issued (shares)	86,149,975	72,711,371
Common stock, share outstanding (shares)	86,149,975	72,711,371
Minimum [Member]
Range of interest	0.00%	0.00%
Maximum [Member] \| London Interbank Offered Rate (LIBOR) [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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