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Supplemental Cash Flow Information - Additional Information Relating to Cash Flow Activities (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Cash refunds for:    
Income taxes, net $ (319) $ (48)
Noncash continuing investing and financing activities:    
Accounts receivable, supplies and accounts payable associated with additions of property, plant and equipment 11,152 14,845
Accounts payable associated with debt issuance costs incurred relating to senior secured notes   731
Series E Redeemable Preferred Stock [Member]    
Noncash continuing investing and financing activities:    
Dividends accrued on Series E Redeemable Preferred 16,996 12,062
Accretion of Series E Redeemable Preferred $ 1,009 $ 993