Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Income (Loss) Attributable to Parent	$ (82,477)	$ 10,529	$ (474)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(15,840)	1,072	9,611
Income (Loss) from Continuing Operations Attributable to Parent	(66,637)	9,457	(10,085)
Adjustments to reconcile net income (loss) from continuing operations to net cash flows from operating activities:
Depreciation and amortization	51,952	32,180	30,522
Asset impairment charges	24,613	0	0
Losses (gains) on sale of property, plant and equipment	483	(2,872)	296
Loss on sale of investments	0	63	3,000
Deferred income taxes	(26,831)	5,384	(4,344)
Excess tax benefits of share-based compensation plans	0	(8,352)	0
Stock and deferred compensation plans	10,125	6,992	5,780
Pension expense, net of payments	58,358	4,433	7,877
Other changes in certain working capital accounts, net	(43,790)	29,243	(31,210)
Miscellaneous, net	555	1,767	4,925
Net cash provided by continuing operating activities	8,828	78,295	6,761
Net cash provided by discontinued operating activities	42	23,760	26,744
Net operating activities	8,870	102,055	33,505
Cash Flows from Investing Activities:
Acquisitions, net of cash acquired	46,838	149,284	0
Proceeds from sale of property, plant and equipment	1,722	5,856	38
Proceeds from sale of property held for sale	14,500	0	0
Additions to property, plant and equipment	(23,105)	(16,300)	(15,857)
Change in restricted cash	250	1,400	1,800
Purchase of investments	(7,658)	(2,652)	(1,575)
Miscellaneous, net	1,578	2,007	69
Net cash used in continuing investing activities	(59,551)	(158,973)	(15,525)
Net cash used in discontinued investing activities	(1,561)	(1,564)	(4,358)
Net investing activities	(61,112)	(160,537)	(19,883)
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt	200,000	0	200,000
Payments on long-term debt	(122,406)	(2,000)	(196,100)
Payments of financing costs	(2,592)	(483)	(2,470)
Dividends paid	(59,523)	0	0
Repurchase of Class A Common shares	(16,222)	(21,237)	(74,199)
Proceeds from employee stock options	7,249	16,579	46,624
Tax payments related to shares withheld for vested stock and RSUs	(5,237)	(4,261)	(6,270)
Excess tax benefits from stock compensation plans	0	8,352	0
Miscellaneous, net	575	(1,264)	(2,484)
Net cash provided by (used in) continuing financing activities	1,844	(4,314)	(34,899)
Net cash used in discontinued financing activities	0	0	(110)
Net financing activities	1,844	(4,314)	(35,009)
Decrease in cash and cash equivalents	(50,398)	(62,796)	(21,387)
Cash and cash equivalents:
Beginning of year	158,459	221,255	242,642
End of year	$ 108,061	$ 158,459	$ 221,255