Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Statement of Comprehensive Income [Abstract]    
Net income (loss) $ (38,697) $ 10,295
Other comprehensive loss:    
Change in pension and postretirement obligations, net of tax of $0 and $0 in 2016 (1) 0
Total Other Comprehensive Income (Loss), Net of Tax (1) 0
Comprehensive income (loss) $ (38,698) $ 10,295