Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Operating activities:
Net income (loss)	$ 69,182	$ 63,238
(Income) loss from discontinued operations, net of tax provision	5	235
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Non-cash operating items (Note 2)	(127,474)	(68,552)
Changes in operating assets and liabilities:
Other current assets and other assets	(934)	(204)
Accrued expenses and other current liabilities	329	(1,099)
Income taxes receivable and payable	43,083	80
Pension and other postretirement liabilities	(432)	(317)
Long-term liabilities	1,340	1,036
Net cash provided by (used in) operating activities - continuing operations	(14,901)	(5,583)
Net cash provided by (used in) operating activities - discontinued operations	(2,809)	(5,619)
Net cash provided by (used in) operating activities	(17,710)	(11,202)
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	242,735
Increase (decrease) in cash and cash equivalents	225,025	(11,202)
Cash and cash equivalents - beginning of period	37,458	58,853
Cash and cash equivalents - end of period	$ 262,483	$ 47,651