Fair Value of Financial Instruments	12 Months Ended
Fair Value of Financial Instruments	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments Our estimates of the fair value of (i) cash and cash equivalents, restricted cash, accounts receivable, accounts payable and accrued expenses approximate carrying value due to the relatively short maturity of these instruments; (ii) our publicly-traded debt is based on observable market data (a Level 2 input) and has an estimated fair value of $1.3 billion and $1.0 billion at December 31, 2012 and 2011, respectively; and (iii) our debt that is not publicly-traded is based on a discounted cash flow model using effective borrowing rates for debt with similar terms, loan to estimated fair value of collateral and remaining maturities (a Level 3 input) and has an estimated fair value of $369.6 million and $640.9 million at December 31, 2012 and 2011, respectively. The estimated fair value of all our debt was $1.7 billion at December 31, 2012 and 2011 (with a carrying value of $1.6 billion at December 31, 2012 and 2011). Disclosures about fair value of financial instruments are based on pertinent information available to management as of December 31, 2012. Considerable judgment is necessary to interpret market data and develop estimated fair value. Accordingly, the estimates presented herein are not necessarily indicative of the amounts that we could realize on disposition of the financial instruments. The use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts.

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

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