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Supplemental Cash Flow Information - Additional Information Relating to Cash Flow Activities (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Cash refunds for:    
Income taxes, net $ (183) $ (319)
Noncash continuing investing and financing activities:    
Accounts receivable, supplies, other assets, accounts payable and accrued liabilities associated with additions of property, plant and equipment 15,484 11,152
Accounts payable associated with financing professional fees 1,916  
Extinguishment of PPP loan 10,000  
Series E Redeemable Preferred Stock [Member]    
Noncash continuing investing and financing activities:    
Dividends accrued on Series E Redeemable Preferred 19,724 16,996
Accretion of Series E Redeemable Preferred $ 1,024 $ 1,009