Commitments and Contingencies	3 Months Ended
Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	9. COMMITMENTS AND CONTINGENCIES Commitments – In the fourth quarter of 2016, we entered into a contract to purchase two medium aircraft for use in our Oil and Gas segment. We expect to take delivery of the aircraft in the second quarter of 2017. The total remaining purchase commitment is $17.9 million. Total aircraft deposits of $4.9 million were included in Other Assets as of March 31, 2017. This amount represents deposits for aircraft purchase contracts and deposits on future lease buyout options. In the event the buyout options are not exercised, the deposits will be applied as lease payments. As of March 31, 2017, we had options to purchase aircraft under leases becoming exercisable in 2017 through 2021. The aggregate option purchase prices are $37.1 million in 2017, $127.0 million in 2018, $129.0 million in 2019, and $22.7 million in 2020. Subsequent to March 31, 2017, we purchased one heavy aircraft from a lessor for $17.0 million. Under current conditions, we believe it is unlikely that we will exercise the remaining 2017 purchase options, unless opportunistic conditions arise. Environmental Matters – PHI has recorded an estimated liability of $0.15 million as of March 31, 2017 for environmental response costs. Previously, PHI conducted environmental surveys of its former Lafayette Facility located at the Lafayette Regional Airport, which former facility PHI vacated in 2001, and has 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, PHI has performed groundwater sampling of the required groundwater monitor well installations at both former PHI facility parcels and submitted these sampling reports to the LDEQ. Pursuant to an agreement with the LDEQ, PHI provided groundwater sample results semi-annually to the LDEQ for both former PHI facility parcels from 2005 to 2015. LDEQ approved a reduction in the sampling program from semi-annual to annual groundwater monitoring in 2015. Based on PHI’s working relationship and agreements with the LDEQ, and the results of ongoing former facility parcel monitoring, PHI believes that ultimate remediation costs for the subject parcels will not be material to PHI’s 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, various 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. All aircraft leases contain purchase options exercisable by us at certain dates in the lease agreements. At March 31, 2017, we had approximately $219.6 million in aggregate commitments under operating leases of which approximately $34.7 million is payable through December 31, 2017. The total lease commitments include $205.0 million for aircraft and $14.6 million for facility lease commitments.

9. COMMITMENTS AND CONTINGENCIES

Commitments – In the fourth quarter of 2016, we entered into a contract to purchase two medium aircraft for use in our Oil and Gas segment. We expect to take delivery of the aircraft in the second quarter of 2017. The total remaining purchase commitment is $17.9 million.

Total aircraft deposits of $4.9 million were included in Other Assets as of March 31, 2017. This amount represents deposits for aircraft purchase contracts and deposits on future lease buyout options. In the event the buyout options are not exercised, the deposits will be applied as lease payments.

As of March 31, 2017, we had options to purchase aircraft under leases becoming exercisable in 2017 through 2021. The aggregate option purchase prices are $37.1 million in 2017, $127.0 million in 2018, $129.0 million in 2019, and $22.7 million in 2020. Subsequent to March 31, 2017, we purchased one heavy aircraft from a lessor for $17.0 million. Under current conditions, we believe it is unlikely that we will exercise the remaining 2017 purchase options, unless opportunistic conditions arise.

Environmental Matters – PHI has recorded an estimated liability of $0.15 million as of March 31, 2017 for environmental response costs. Previously, PHI conducted environmental surveys of its former Lafayette Facility located at the Lafayette Regional Airport, which former facility PHI vacated in 2001, and has 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, PHI has performed groundwater sampling of the required groundwater monitor well installations at both former PHI facility parcels and submitted these sampling reports to the LDEQ. Pursuant to an agreement with the LDEQ, PHI provided groundwater sample results semi-annually to the LDEQ for both former PHI facility parcels from 2005 to 2015. LDEQ approved a reduction in the sampling program from semi-annual to annual groundwater monitoring in 2015. Based on PHI’s working relationship and agreements with the LDEQ, and the results of ongoing former facility parcel monitoring, PHI believes that ultimate remediation costs for the subject parcels will not be material to PHI’s 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, various 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. All aircraft leases contain purchase options exercisable by us at certain dates in the lease agreements.

At March 31, 2017, we had approximately $219.6 million in aggregate commitments under operating leases of which approximately $34.7 million is payable through December 31, 2017. The total lease commitments include $205.0 million for aircraft and $14.6 million for facility lease commitments.