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Supplemental Cash Flow Information - Additional Information Relating to Cash Flow Activities (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Cash refunds for:    
Income taxes, net $ (66) $ (1,141)
Noncash continuing investing and financing activities:    
Supplies, accounts payable and accrued liabilities associated with additions of property, plant and equipment 21,251 14,609
Series E Redeemable Preferred Stock [Member]    
Noncash continuing investing and financing activities:    
Dividends accrued on redeemable preferred 22,609 19,748
Accretion of redeemable preferred $ 1,493 $ 2,882