Commitments and Contingencies	9 Months Ended
Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Commitments – We currently have no aircraft purchase commitments. Total aircraft deposits of $0.5 million were included in Other Assets as of September 30, 2018. This amount represents a deposit on a future lease buyout option. In the event we do not exercise the buyout option, the deposit will be applied against lease payments. Environmental Matters – We have recorded an estimated liability of $0.15 million as of September 30, 2018 for environmental response costs. Previously, we conducted environmental surveys of our former Lafayette Facility located at the Lafayette Regional Airport, which we vacated in 2001, and determined that limited soil and groundwater contamination exist at two parcels of land at the former facility. An Assessment Report for both parcels was submitted in 2003 (and updated in 2006) to the Louisiana Department of Environmental Quality ("LDEQ") and the Louisiana Department of Natural Resources ("LDNR"). Approvals for the Assessment Report were received from the LDEQ and LDNR in 2010 and 2011, respectively. Since that time, we have performed groundwater sampling of the required groundwater monitor well installations at both parcels and submitted these sampling reports to the LDEQ. Pursuant to an agreement with the LDEQ, we provided groundwater sample results semi-annually to the LDEQ for both parcels from 2005 to 2015. The LDEQ approved a reduction in the sampling program from semi-annual to annual groundwater monitoring in 2015. Based on our working relationship and agreements with the LDEQ, and the results of ongoing former facility parcel monitoring, we believe that ultimate remediation costs for the subject parcels will not be material to our consolidated financial position, operations or cash flows. Legal Matters – From time to time, we are involved in various legal actions incidental to our business, including actions relating to employee claims, medical malpractice claims, tax issues, grievance hearings before labor regulatory agencies, and miscellaneous third party tort actions. The outcome of these proceedings is not predictable. However, based on current circumstances, we do not believe that the ultimate resolution of our presently pending proceedings, after considering available defenses and any insurance coverage or indemnification rights, will have a material adverse effect on our financial position, results of operations or cash flows. Operating Leases – We lease certain aircraft, facilities, and equipment used in our operations. The related lease agreements, which include both non-cancelable and month-to-month terms, generally provide for fixed monthly rentals, and certain real estate leases also include renewal options. We generally pay all insurance, taxes, and maintenance expenses associated with these leases. At September 30, 2018, we had approximately $173.2 million in aggregate commitments under operating leases of which approximately $11.0 million is payable through the fourth quarter of 2018. The total lease commitments include $154.1 million for aircraft and $19.1 million for facility lease commitments. As of September 30, 2018, we had options to purchase aircraft under leases, with such purchase options becoming exercisable in 2019 and 2020. The aggregate option purchase prices are $129.0 million in 2019, and $22.7 million in 2020. Under current conditions, we believe it is unlikely that we will exercise the purchase options arising over the next year, unless opportunistic conditions arise. A majority of our aircraft operating leases contain financial covenants that are substantially similar to the financial covenants that were contained in our revolving credit facility at the time the leases were entered into. We have solicited and received amendments and waivers of certain covenants in some of these leases. We remain in active discussions with our aircraft lessors to resolve open issues and pursue any additional waivers or amendments that may be required, but cannot assure you that these efforts will be successful. Generally in the event of a default, the applicable lessor has the option of terminating the lease and requiring the return of the leased aircraft, with the repayment of any arrears of lease payments plus additional damages which may include the present value of all future lease payments and certain other amounts which could be material to our financial position. Defaults caused by payment failures or resulting in the acceleration of payment obligations would constitute an event of default under our senior notes if they involve sums in an aggregate amount in excess of $20 million. Our term loan and many of our operating leases contain similar cross-default or cross-acceleration provisions. Thus, our failure to meet the financial covenants in our operating lease agreements could ultimately result in the acceleration of significant obligations under other of our finance or lease instruments

COMMITMENTS AND CONTINGENCIES

Commitments – We currently have no aircraft purchase commitments.

Total aircraft deposits of $0.5 million were included in Other Assets as of September 30, 2018. This amount represents a deposit on a future lease buyout option. In the event we do not exercise the buyout option, the deposit will be applied against lease payments.

Environmental Matters – We have recorded an estimated liability of $0.15 million as of September 30, 2018 for environmental response costs. Previously, we conducted environmental surveys of our former Lafayette Facility located at the Lafayette Regional Airport, which we vacated in 2001, and determined that limited soil and groundwater contamination exist at two parcels of land at the former facility. An Assessment Report for both parcels was submitted in 2003 (and updated in 2006) to the Louisiana Department of Environmental Quality ("LDEQ") and the Louisiana Department of Natural Resources ("LDNR"). Approvals for the Assessment Report were received from the LDEQ and LDNR in 2010 and 2011, respectively. Since that time, we have performed groundwater sampling of the required groundwater monitor well installations at both parcels and submitted these sampling reports to the LDEQ. Pursuant to an agreement with the LDEQ, we provided groundwater sample results semi-annually to the LDEQ for both parcels from 2005 to 2015. The LDEQ approved a reduction in the sampling program from semi-annual to annual groundwater monitoring in 2015. Based on our working relationship and agreements with the LDEQ, and the results of ongoing former facility parcel monitoring, we believe that ultimate remediation costs for the subject parcels will not be material to our consolidated financial position, operations or cash flows.

Legal Matters – From time to time, we are involved in various legal actions incidental to our business, including actions relating to employee claims, medical malpractice claims, tax issues, grievance hearings before labor regulatory agencies, and miscellaneous third party tort actions. The outcome of these proceedings is not predictable. However, based on current circumstances, we do not believe that the ultimate resolution of our presently pending proceedings, after considering available defenses and any insurance coverage or indemnification rights, will have a material adverse effect on our financial position, results of operations or cash flows.

Operating Leases – We lease certain aircraft, facilities, and equipment used in our operations. The related lease agreements, which include both non-cancelable and month-to-month terms, generally provide for fixed monthly rentals, and certain real estate leases also include renewal options. We generally pay all insurance, taxes, and maintenance expenses associated with these leases.

At September 30, 2018, we had approximately $173.2 million in aggregate commitments under operating leases of which approximately $11.0 million is payable through the fourth quarter of 2018. The total lease commitments include $154.1 million for aircraft and $19.1 million for facility lease commitments.

As of September 30, 2018, we had options to purchase aircraft under leases, with such purchase options becoming exercisable in 2019 and 2020. The aggregate option purchase prices are $129.0 million in 2019, and $22.7 million in 2020. Under current conditions, we believe it is unlikely that we will exercise the purchase options arising over the next year, unless opportunistic conditions arise.

A majority of our aircraft operating leases contain financial covenants that are substantially similar to the financial covenants that were contained in our revolving credit facility at the time the leases were entered into. We have solicited and received amendments and waivers of certain covenants in some of these leases. We remain in active discussions with our aircraft lessors to resolve open issues and pursue any additional waivers or amendments that may be required, but cannot assure you that these efforts will be successful.

Generally in the event of a default, the applicable lessor has the option of terminating the lease and requiring the return of the leased aircraft, with the repayment of any arrears of lease payments plus additional damages which may include the present value of all future lease payments and certain other amounts which could be material to our financial position. Defaults caused by payment failures or resulting in the acceleration of payment obligations would constitute an event of default under our senior notes if they involve sums in an aggregate amount in excess of $20 million. Our term loan and many of our operating leases contain similar cross-default or cross-acceleration provisions. Thus, our failure to meet the financial covenants in our operating lease agreements could ultimately result in the acceleration of significant obligations under other of our finance or lease instruments