Supplemental Financial Information - Assets Held for Sale (Detail) $ in Thousands	Dec. 31, 2021 USD ($)
Assets, Current [Abstract]
Trade receivables, net	$ 7,306
Materials and supplies	13,510
Prepaid expenses and other current assets	3,768
Property & equipment, net	87,441
Noncurrent deferred contract costs	4,196
Operating lease ROU asset	197
Other noncurrent assets	699
Assets held for sale	$ 117,117

Disposal group, including discontinued operation, deferred contract costs, noncurrent.

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Disposal group, including discontinued operation, operating lease right of use assets.

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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