CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
CONSOLIDATED BALANCE SHEETS
Deferred financing costs, accumulated amortization (in dollars)	$ 35,999	$ 33,389
Preference shares, par value (in dollars per share)	$ 0.01	$ 0.01
Preference shares, authorized shares	200,000,000us-gaap_PreferredStockSharesAuthorized	200,000,000us-gaap_PreferredStockSharesAuthorized
Preference shares, issued shares	0us-gaap_PreferredStockSharesIssued	0us-gaap_PreferredStockSharesIssued
Common shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common shares, authorized shares	2,000,000,000us-gaap_CommonStockSharesAuthorized	2,000,000,000us-gaap_CommonStockSharesAuthorized
Common shares, issued shares	393,149,315us-gaap_CommonStockSharesIssued	392,443,048us-gaap_CommonStockSharesIssued
Treasury stock, shares	5,560,579us-gaap_TreasuryStockShares	5,555,088us-gaap_TreasuryStockShares

Carrying amount of accumulated amortization of long-term deferred finance costs capitalized at the end of the reporting period.

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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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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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