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Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
Discontinued Operations (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Spin-off Costs Incurred to Date	$ 0		$ 46,384	$ 1,721
Discontinued Operation, Revenue	0	$ 258,649	403,688	745,079
Discontinued Operation, Costs of Goods and Services	0	163,509	254,205	469,280
Discontinued Operation, Gross Profit	0	95,140	149,483	275,799
Discontinued Operation, Selling, General and Administrative Expense	0	64,170	144,114	186,517
Discontinued Operation, Operating Earnings	0	30,970	5,369	89,282
Discontinued Operation, Other Expense, Net	0	318	349	802
Discontinued Operation, Earnings from Discontinued Operations Before Taxes	0	30,652	5,020	88,480
Discontinued Operation, Provision for Income Taxes	0	11,195	9,492	30,281
Earnings (loss) from discontinued operations	0	19,457	(4,472)	58,199
Proceeds from sale of businesses			2,069	121,175
Gain on sale of business	0	$ 0	0	90,093
Discontinued Operation, Accounts Receivable					$ 202,052
Discontinued Operation, Inventory, Net					201,591
Discontinued Operation, Prepaid and Other Current Assets					14,035
Total Current Assets					417,678
Discontinued Operation, Property, Plant and Equipment, Net					211,832
Discontinued Operation, Goodwill and Intangible Assets, Net					1,232,843
Discontinued Operation, Other Assets and Deferred Charges					3,200
Total Assets of Discontinued Operations	0		0		1,865,553
Discontinued Operation, Accounts Payable					97,439
Discontinued Operation, Other Current Liabilities					59,482
Discontinued Operation, Current liabilities					156,921
Discontinued Operation, Deferred Income Taxes					90,641
Discontinued Operation, Other Liabilities					16,691
Total Liabilities of Discontinued Operations	$ 0		$ 0		$ 264,253
Performance Motorsports International [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Sale of Notes Receivable				10,000
Proceeds from sale of businesses				147,313
Proceeds from Divestiture of Businesses, Net of Cash Divested				118,706
Gain on sale of business				$ 88,402
Noncontrolling Interest		25.00%		25.00%
Noncontrolling Interest, Increase from Sale of Parent Equity Interest				$ 18,607
Tipper Tie [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on sale of business				$ 1,691