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Supplemental Cash Flow Information - Additional Information Relating to Cash Flow Activities (Detail) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Cash refunds for:    
Income taxes, net $ (48) $ (962)
Noncash continuing investing and financing activities:    
Supplies and accounts payable associated with additions of property, plant and equipment 12,062 13,156
Accounts payable associated with debt issuance costs incurred relating to senior secured notes 731 1,109
Series E Redeemable Preferred Stock [Member]    
Noncash continuing investing and financing activities:    
Dividends accrued on redeemable preferred 14,845 12,966
Accretion of redeemable preferred $ 993 $ 2,401