Supplemental Cash Flow Information - Additional Information Relating to Cash Flow Activities (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash refunds for:
Income taxes, net	$ (183)	$ (319)
Noncash investing and financing activities:
Accounts receivable, supplies, other assets, accounts payable and accrued liabilities associated with additions of property, plant and equipment	20,321	12,974
Extinguishment of PPP loan	10,000
Accounts payable associated with debt-related costs	8,870
Series E and Series F Redeemable Preferred Stock [Member]
Noncash investing and financing activities:
Series E and Series F Redeemable Preferred and related dividends, accretion, and embedded derivative exchanged for common stock, net of related costs in accounts payable	$ 301,403	$ 27,402