Leases	3 Months Ended
	Dec. 31, 2021
Leases [Abstract]
Leases	Leases    In October 2021, the Company executed two lease contracts for drilling rig services in Pennsylvania with lease terms of greater than one year. One of the new lease contracts commenced in December 2021 with estimated lease payments of $8.4 million over the lease term. This lease has been recognized on the Consolidated Balance Sheet at December 31, 2021. A right-of-use operating lease asset of $8.1 million is recorded in Deferred Charges, the current portion of the operating lease liability ($7.2 million) is recorded in Other Accruals and Current Liabilities, and the noncurrent portion of the operating lease liability ($0.9 million) is recorded in Other Liabilities. The second lease contract, which is also an operating lease, commenced in January 2022 with estimated lease payments of $11.9 million over the lease term.