Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income (loss)	$ 82,990	$ 50,935
(Income) Loss from discontinued operations, net of tax		62
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Non-cash operating items (Note 2)	(88,491)	(57,158)
Changes in operating assets and liabilities:
Other current assets	(347)	(377)
Accrued employment costs and other current liabilities	(645)	576
Income tax refund receivable	2,965	287
Pension and other postretirement liabilities	(375)	(2,396)
Other liabilities	2,463	1,915
Net cash provided by (used in) operating activities – continuing operations	(1,440)	(6,156)
Net cash provided by (used in) operating activities – discontinued operations	1,812	(79)
Net cash provided by (used in) operating activities	372	(6,235)
Cash, cash equivalents and restricted cash (Note 2) - period increase (decrease)	372	(6,235)
Cash, cash equivalents and restricted cash (Note 2) - beginning of period	257,251	255,443
Cash, cash equivalents and restricted cash - end of period	$ 257,623	$ 249,208