The Company leases 556 aircraft, as well as airport facilities, office space, and various other property and equipment under non-cancelable operating leases which are generally on a long-term net rent basis where the Company pays taxes, maintenance, insurance and certain other operating expenses applicable to the leased property. The following table summarizes future minimum rental payments required under operating leases that have initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2011 (in thousands):

Year ending December 31,

2012	$	392,165
2013		369,002
2014		348,323
2015		305,828
2016		239,698
Thereafter		907,252

	$	2,562,268

The majority of the Company's leased aircraft are owned and leased through trusts whose sole purpose is to purchase, finance and lease these aircraft to the Company; therefore, they meet the criteria of a variable interest entity. However, since these are single owner trusts in which the Company does not participate, the Company is not considered at risk for losses and is not considered the primary beneficiary. As a result, based on the current rules, the Company is not required to consolidate any of these trusts or any other entities in applying the accounting guidance. Management believes that the Company's maximum exposure under these leases is the remaining lease payments.

Total rental expense for non-cancelable aircraft operating leases was approximately $346.5 million, $311.9 million and $300.8 million for the years ended December 31, 2011, 2010 and 2009, respectively. The minimum rental expense for airport station rents was approximately $42.6 million, $43.5 million and $47.7 million for the years ended December 31, 2011, 2010 and 2009, respectively.

The Company's leveraged lease agreements, typically obligate the Company to indemnify the equity/owner participant against liabilities that may arise due to changes in benefits from tax ownership of the respective leased aircraft. The terms of these contracts range up to 17 years. The Company did not accrue any liability relating to the indemnification to the equity/owner participant because of management's assessment that the probability of this occurring is remote.

The Company self-insures a portion of its potential losses from claims related to workers' compensation, environmental issues, property damage, medical insurance for employees and general liability. Losses are accrued based on an estimate of the ultimate aggregate liability for claims incurred, using standard industry practices and the Company's actual experience. Actual results could differ from these estimates.

The Company is subject to certain legal actions which it considers routine to its business activities. As of December 31, 2011, management believes, after consultation with legal counsel, that the ultimate outcome of such legal matters is not likely to have a material adverse effect on the Company's financial position, liquidity or results of operations. However, the following is a significant outstanding legal matter.

During the quarter ended December 31, 2007, Delta notified the Company, SkyWest Airlines and Atlantic Southeast of a dispute under the Delta Connection Agreements executed by Delta with SkyWest Airlines and Atlantic Southeast. The dispute relates to the allocation of liability for certain irregular operation ("IROP") expenses paid by SkyWest Airlines and Atlantic Southeast to their passengers and vendors under certain situations. During the period between the execution of the Delta Connection Agreements in September 2005 and December 2007, SkyWest Airlines and Atlantic Southeast passed through to Delta IROP expenses that were paid pursuant to Delta's policies, and Delta accepted and reimbursed those expenses. Delta now claims it is obligated to reimburse only a fraction of the IROP expenses. As a result, Delta withheld a combined total of approximately $25 million (pre-tax) from one of the weekly scheduled wire payments to SkyWest Airlines and Atlantic Southeast (now ExpressJet) during December 2007. Since December 2007, Delta has continued to withhold payments from the weekly scheduled wire payments to SkyWest Airlines and Atlantic Southeast, and has disputed subsequent billings for IROP expenses. As of December 31, 2011, the Company had recognized a cumulative total of $31.7 million of revenue associated with the funds withheld by Delta. Since July 1, 2008, the Company has not recognized revenue related to IROP expense reimbursements withheld by Delta because collection of those reimbursements is the subject of litigation and is not reasonably assured. On February 1, 2008, SkyWest Airlines and Atlantic Southeast filed a Complaint in the Superior Court for Fulton County, Georgia ("Superior Court") challenging Delta's treatment of the matter and seeking recovery of the payments withheld by Delta and any future withholdings related to this issue. Delta filed an Answer to the SkyWest Airlines and Atlantic Southeast Complaint and a Counterclaim against SkyWest Airlines and Atlantic Southeast on March 24, 2008. Delta's Counterclaim alleged that Atlantic Southeast and SkyWest Airlines breached the Delta Connection Agreements by invoicing Delta for IROP expenses that were paid pursuant to Delta's policies, and claims only a portion of those expenses may be invoiced to Delta.

After proceedings that included contested motions, document discovery, and depositions, Delta voluntarily dismissed its Counterclaim. Discovery in that action was not complete at the time of dismissal. On February 14, 2011, SkyWest Airlines and Atlantic Southeast exercised their statutory rights to voluntarily dismiss their claims in the Superior Court, and filed a new complaint (the "State Court Complaint") in the Georgia State Court of Fulton County (the "State Court"). The claims continue to include breach of contract, breach of contract based on mutual departure, breach of contract based on voluntary payment, and breach of the duty of good faith and fair dealing. Delta moved for partial dismissal of the State Court Complaint, which motion was denied in its entirety. Delta also filed a separate action in the Superior Court containing claims for declaratory judgment and breach of the confidentiality provisions of the Delta Connection Agreements. SkyWest Airlines and Atlantic Southeast moved for dismissal of Delta's claims in the Superior Court. A hearing on SkyWest Airlines' and Atlantic Southeast's motion was held on April 27, 2011, after which the Superior Court dismissed Delta's complaint in its entirety. Discovery in the lawsuit is ongoing.

On September 22, 2011, Delta filed a motion for leave to file a counterclaim against SkyWest and Atlantic Southeast. The proposed counterclaim contains claims for unjust enrichment and breach of contract related to alleged non-revenue positive space flying by SkyWest and Atlantic Southeast employees for non-Delta related business. Delta's proposed counterclaim does not specify an amount of damages, but the proposed counterclaim alleges, on information and belief, that Delta's damages exceed $4.5 million. The State Court has not ruled on Delta's motion for leave to file its proposed counterclaim. An estimated loss is accrued if the loss is probable and reasonably estimable. Because these conditions have not been satisfied, the Company has not recorded a loss in its consolidated financial statements with respect to the dispute. As of December 31, 2011, a range of reasonably possible loss is not determinable related to this counter claim.

During 2010, the Company and Delta began preliminary settlement discussions related to the dispute. Notwithstanding the legal merits of the case, the Company offered to settle the claim for approximately $5.9 million less than the cumulative total of revenue recognized related to this matter. Those settlement discussions were not successful; however, as a result of the settlement offer, the Company wrote off $5.9 million of related receivables as of December 31, 2010. As of December 31, 2011, the range of reasonably possible loss related to the dispute is $0 to $25.8 million.

SkyWest Airlines and ExpressJet continue to vigorously pursue their claims set forth in the State Court complaint and will defend against Delta's proposed counterclaim if the court grants Delta leave to file.

The Company requires no collateral from its major partners or customers but monitors the financial condition of its major partners. The Company maintains an allowance for doubtful accounts receivable based upon expected collectability of all accounts receivable. The Company's allowance for doubtful accounts totaled $240,000 and $47,000 as of December 31, 2011 and 2010, respectively. For the years ended December 31, 2011, 2010 and 2009, the Company's contractual relationships with Delta, United and Continental combined accounted for approximately 97.6%, 94.7% and 97.3%, respectively of the Company's total revenues.

As of December 31, 2011, the Company had 18,418 full-time equivalent employees. Approximately 46% of these employees were represented by unions, including the following employee groups. Notwithstanding the completion of the ExpressJet Combination, ExpressJet's employee groups continue to be represented by those unions who provided representation prior to the ExpressJet Combination.

Accordingly, the following table refers to ExpressJet's employee groups based upon their union affiliations prior to the ExpressJet Combination.

Employee Group		Representatives	Status of Agreement

Atlantic Southeast Pilots	1,700	Air Line Pilots Association International	Amendable
Atlantic Southeast Flight Attendants	1,080	Association of Flight Attendants—CNA	Amendable
Atlantic Southeast Flight Controllers	40	Professional Airline Flight Control Association	Amendable
Atlantic Southeast Mechanics	600	International Association of Machinists and Aerospace Workers	Union representation approved. Negotiations have not started.
Atlantic Southeast Stock Clerks	70	International Brotherhood of Teamsters	Union representation approved. Negotiations have not started.
ExpressJet Delaware Pilots	2,700	Air Line Pilots Association International	Amendable
ExpressJet Delaware Flight Attendants	1,300	International Association of Machinists and Aerospace Workers	Amendable
ExpressJet Delaware Mechanics	900	International Brotherhood of Teamsters	Amendable
ExpressJet Delaware Dispatchers	85	Transport Workers Union of America	Amendable
ExpressJet Delaware Stock Clerks	80	International Brotherhood of Teamsters	Union representation approved. Negotiations have not started.