Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities:
Net income (loss)	$ 16,376	$ (36,502)
Loss from discontinued operations	0	15,432
Income (loss) from continuing operations	16,376	(21,070)
Adjustments to reconcile income (loss) from continuing operations to net cash flows from operating activities:
Depreciation and amortization	29,197	21,661
Deferred income taxes	6,825	(9,786)
Stock and deferred compensation plans	8,861	7,886
Pension expense, net of payments	5,099	6,756
Other changes in certain working capital accounts, net	(29,893)	(81,873)
Miscellaneous, net	896	6,810
Net cash provided by (used in) continuing operating activities	37,361	(69,616)
Net cash provided by discontinued operating activities	0	6,646
Net operating activities	37,361	(62,970)
Cash Flows from Investing Activities:
Payments to acquire businesses, net of cash acquired	(43,500)	2,530
Additions to property and equipment	(13,382)	(8,771)
Purchase of investments	(1,728)	(6,450)
Change in restricted cash	1,100	250
Proceeds from sale of property and equipment	22	7
Net cash used in continuing investing activities	(57,488)	(12,434)
Net cash used in discontinued investing activities	0	(1,561)
Net investing activities	(57,488)	(13,995)
Cash Flows from Financing Activities:
Proceeds from issuance of long-term debt	0	200,000
Payments on long-term debt	(2,000)	(117,750)
Payments of financing costs	0	(2,592)
Payments of ordinary dividends, Common Stock	0	(59,523)
Repurchase of Class A Common shares	(18,686)	(2,683)
Proceeds from exercise of employee stock options	4,641	5,539
Tax payments related to shares withheld for RSU vesting	(2,603)	(5,037)
Miscellaneous, net	(2,807)	1,972
Net cash (used in) provided by continuing financing activities	(21,455)	19,926
Decrease in cash and cash equivalents	(41,582)	(57,039)
Cash and cash equivalents:
Beginning of year	108,061	158,459
End of period	66,479	101,420
Supplemental Cash Flow Disclosures
Interest paid	8,143	5,319
Income taxes paid	$ 355	$ 13,970