Fair Value Measurements

Under ASC 820, Fair Value Measurements and Disclosures, disclosures are required about how fair value is determined for assets and liabilities, and a hierarchy for which these assets and liabilities must be grouped is established, based on significant levels of inputs, as follows:

Level 1—Quoted prices in active markets for identical assets or liabilities.

Level 2—Observable inputs other than Level 1 prices such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.

Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The Company utilizes several valuation techniques in order to assess the fair value of the Company’s financial assets and liabilities. The Company’s fuel derivative contracts, which primarily consist of costless collar contracts, are valued using energy and commodity market data, which is derived by combining raw inputs with quantitative models and processes to generate forward curves and volatilities.

The Company utilizes the market approach to measure fair value for its financial assets and liabilities. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities.

Assets and liabilities measured at fair value on a recurring basis are summarized below:



	Fair Value Measurements as of September 30, 2012
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	399.1	$	399.1	$	—	$	—
Option contracts	0.3		—		—		0.3
Total assets	$	399.4	$	399.1	$	—	$	0.3

Basis swaps	$	0.3	$	—	$	—	$	0.3
Option contracts	0.2		—		—		0.2
Total liabilities	$	0.5	$	—	$	—	$	0.5



	Fair Value Measurements as of December 31, 2011
	Total		Level 1		Level 2		Level 3
	(in millions)
Cash and cash equivalents	$	343.3	$	343.3	$	—	$	—
Option contracts	1.0		—		—		1.0
Total assets	$	344.3	$	343.3	$	—	$	1.0

Option contracts	$	0.7	$	—	$	—	$	0.7
Total liabilities	$	0.7	$	—	$	—	$	0.7

Cash and cash equivalents at September 30, 2012 and December 31, 2011 are comprised of liquid money market funds and cash. The Company maintains cash with various high-quality financial institutions. The Company had no transfers of assets or liabilities between any of the above levels during the nine months ended September 30, 2012 or during the year ended December 31, 2011.

The Company did not elect hedge accounting on any of the derivative instruments, and as a result, changes in the fair value of these fuel hedge contracts are recorded each period in aircraft fuel expense. Fair values of the instruments are determined using standard option valuation models. The Company also considers counterparty risk and its own credit risk in its determination of all estimated fair values. The Company offsets fair value amounts recognized for derivative instruments executed with the same counterparty under a master netting arrangement. The Company determines the fair value of fuel derivative option contracts utilizing an option pricing model based on inputs that are either readily available in public markets or can be derived from information available in publicly quoted markets. The Company has consistently applied these valuation techniques in all periods presented and believes it has obtained the most accurate information available for the types of derivative contracts it holds.

Due to the fact that certain inputs utilized to determine the fair value of aircraft fuel derivatives are unobservable (principally implied volatility), the Company has categorized these derivatives as Level 3. Implied volatility of an option contract is the volatility of the price of the underlying that is implied by the market price of the option based on an option pricing model. Thus, it is the volatility that, when used in a particular pricing model, yields a theoretical value for the option equal to the current market price of that option. Implied volatility, a forward-lookingd measure, differs from historical volatility because the latter is calculated from known past returns. At each balance sheet date, the Company substantiates and adjusts unobservable inputs. The Company routinely assesses the valuation model's sensitivity to changes in implied volatility. Based on the Company's assessment of the valuation model's sensitivity to changes in implied volatility, the Company noted that holding other inputs constant, a significant increase (decrease) in implied volatility would result in a significantly higher (lower) determination of fair value measurement for the Company's aircraft fuel derivatives.

The Company's Valuation Group is made up of individuals from the Company's Risk Management, Treasury and Corporate Accounting departments. The Valuation Group is responsible for the Company's valuation policies, procedures and execution thereof. The Company's Valuation Group reports to the Company's Chief Financial Officer and Audit Committee who approve all derivative transactions. The Valuation Group compares the results of the Company's internally developed valuation methods with counterparty reports at each balance sheet date and assesses the Company's valuation methods for accurateness and identifies any needs for modification.

The following table presents the Company’s activity for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):



	Fuel Derivative Activity for Three Months Ended September 30, 2012
	(in millions)
Balance at June 30, 2012	$	(1.0	)
Total gains (losses) realized or unrealized included in earnings, net	1.5
Settlements, net	(0.6		)
Balance at September 30, 2012	$	(0.1	)



	Fuel Derivative Activity for Nine Months Ended September 30, 2012
	(in millions)
Balance at December 31, 2011	$	0.3
Total gains (losses) realized or unrealized included in earnings, net	0.1
Settlements, net	(0.5		)
Balance at September 30, 2012	$	(0.1	)

The Company records the fair value of its aircraft fuel derivatives in the accompanying statement of operations within aircraft fuel and on the balance sheet within other current assets or other current liabilities, depending on whether the net fair value of the derivatives is in an asset or liability position as of the respective balance sheet date.

The Company did not have any outstanding debt as of September 30, 2012 or December 31, 2011.