Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities:
Net income (loss)	$ 4,741	$ 69,182
(Income) loss from discontinued operations, net of tax provision	37	5
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Non-cash operating items (Note 2)	(8,139)	(127,474)
Changes in operating assets and liabilities:
Other current assets	(453)	(934)
Accrued employment costs and other current liabilities	(170)	329
Income taxes receivable and payable	278	43,083
Pension and other postretirement liabilities	(2,381)	(432)
Other liabilities	1,132	1,340
Net cash provided by (used in) operating activities - continuing operations	(4,955)	(14,901)
Net cash provided by (used in) operating activities - discontinued operations	(47)	(2,809)
Net cash provided by (used in) operating activities	(5,002)	(17,710)
Investing activities:
Distribution received from affiliate		242,735
Net cash provided by (used in) investing activities - continuing operations		242,735
Net cash provided by (used in) investing activities - discontinued operations
Net cash provided by (used in) investing activities		242,735
Cash, cash equivalents and restricted cash (Note 2) - period (decrease) increase	(5,002)	225,025
Cash, cash equivalents and restricted cash (Note 2) - beginning of year	255,443	37,458
Cash, cash equivalents and restricted cash - end of period	$ 250,441	$ 262,483