Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities:
Net income (loss)	$ 76,743	$ 4,741
(Income) Loss from discontinued operations, net of tax		37
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Non-cash operating items (Note 2)	(79,449)	(8,139)
Changes in operating assets and liabilities:
Other current assets	(419)	(453)
Accrued employment costs and other current liabilities	(1,476)	(170)
Income tax refund receivable	2,998	278
Pension and other postretirement liabilities	(115)	(2,381)
Other liabilities	720	1,132
Net cash provided by (used in) operating activities – continuing operations	(998)	(4,955)
Net cash provided by (used in) operating activities – discontinued operations	1,737	(47)
Net cash provided by (used in) operating activities	739	(5,002)
Cash, cash equivalents and restricted cash (Note 2) - period increase (decrease)	739	(5,002)
Cash, cash equivalents and restricted cash (Note 2) - beginning of period	257,251	255,443
Cash, cash equivalents and restricted cash - end of period	$ 257,990	$ 250,441