Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating activities:
Net (loss) income	$ (47,777)	$ 76,743
Adjustments to reconcile net (loss) income to net cash used in operating activities:
Non-cash operating items (Note 2)	40,900	(79,449)
Changes in operating assets and liabilities:
Other current assets	56	(419)
Accrued employment costs and other current liabilities	(570)	(1,476)
Income taxes receivable and payable	(898)	2,998
Pension and other postretirement liabilities	(948)	(115)
Other liabilities	1,926	720
Net cash provided by (used in) operating activities - continuing operations	(7,311)	(998)
Net cash provided by (used in) operating activities - discontinued operations	0	1,737
Net cash provided by (used in) operating activities	(7,311)	739
Financing activities:
Dividend paid	(170,130)	0
Net cash (used in) provided by financing activities - continuing operations	(170,130)	0
Net cash provided by financing activities - discontinued operations	0	0
Net cash (used in) provided by financing activities	(170,130)	0
Cash, cash equivalents and restricted cash (Note 2) - period increase (decrease)	(177,441)	739
Cash, cash equivalents and restricted cash (Note 2) - beginning of year	259,371	257,251
Cash, cash equivalents and restricted cash - end of period	$ 81,930	$ 257,990