Income Taxes - Deferred Income Taxes Related to Temporary Differences between Tax Bases of Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Deferred tax liabilities:
Accelerated depreciation	$ 244,141	$ 217,125
Prepaid costs currently deductible	6,069	5,039
Other	6,553	5,970
Total deferred tax liabilities	256,763	228,134
Deferred tax assets:
Accrued costs not yet deductible	11,010	9,200
Allowance for doubtful accounts	548	536
Deferred revenues	219
Share-based compensation	2,561	2,321
Total deferred tax assets, net of valuation allowance of $0.2 million in 2021 and 2020	14,338	12,057
Deferred income taxes, net	$ 242,425	$ 216,077