Fair Value Measurements	3 Months Ended
Fair Value Measurements	Mar. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The fair value of an asset is defined as the exit price, which is the amount that would either be received when an asset is sold or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The guidance establishes a three-tier fair value hierarchy based on the inputs used in measuring fair value. These tiers are: Level 1, for which quoted market prices for identical instruments are available in active markets, such as money market funds, equity securities and U.S. Treasury securities; Level 2, for which there are inputs other than quoted prices included within Level 1 that are observable for the instrument, such as certain derivative instruments, including interest rate caps and swaps; and Level 3, for securities that do not fall into Level 1 or Level 2 and for which little or no market data exists, therefore requiring us to develop our own assumptions. Derivative Assets and Liabilities — Our derivative assets and liabilities are comprised of interest rate swaps and caps. These derivative instruments were measured at fair value using readily observable market inputs, such as quotations on interest rates. These derivative instruments were classified as Level 2 as these instruments are custom, over-the-counter contracts with various bank counterparties that are not traded in an active market (Note 8). We did not have any transfers into or out of Level 1, Level 2 and Level 3 measurements during the three months ended March 31, 2016 or 2015. Gains and losses (realized and unrealized) included in earnings are reported in Other income and (expenses) in the consolidated financial statements. Our non-recourse debt, net, which we have classified as Level 3, had a carrying value of $1.4 billion at both March 31, 2016 and December 31, 2015, and an estimated fair value of $1.5 billion and $1.4 billion at March 31, 2016 and December 31, 2015, respectively. We determined the estimated fair value using a discounted cash flow model with rates that take into account the interest rate risk. We also considered the value of the underlying collateral, taking into account the quality of the collateral and the then-current interest rate. We estimated that our other financial assets and liabilities had fair values that approximated their carrying values at both March 31, 2016 and December 31, 2015.

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.