Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net					$ 202,052
Disposal Group, Including Discontinued Operation, Revenue	$ 119,647	$ 256,156	$ 403,688	$ 486,430
Disposal Group, Including Discontinued Operation, Costs of Goods Sold	76,277	160,817	254,205	305,771
Disposal Group, Including Discontinued Operation, Gross Profit (Loss)	43,370	95,339	149,483	180,659
Disposal Group, Including Discontinued Operation, General and Administrative Expense	64,990	62,773	144,114	122,347
Disposal Group, Including Discontinued Operation, Operating Income (Loss)	(21,620)	32,566	5,369	58,312
Disposal Group, Including Discontinued Operation, Other Income	(134)	(165)	(349)	(484)
SpinOffCostsIncurredToDate	34,638		46,384	0
Proceeds from sale of businesses			2,069	121,175
Gain on sale of business	0	0	0	90,093
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	(21,486)	32,731	5,020	57,828
Discontinued Operation, Tax Effect of Discontinued Operation	5,011	11,148	9,492	19,086
(Loss) earnings from discontinued operations	(26,497)	$ 21,583	(4,472)	38,742
Disposal Group, Including Discontinued Operation, Inventory					201,591
Disposal Group, Including Discontinued Operation, Other Assets, Current					14,035
Current assets					417,678
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment					211,832
Disposal Group, Including Discontinued Operation, Goodwill					1,232,843
Disposal Group, Including Discontinued Operation, Other Assets					3,200
Total assets of discontinued operations	0		0		1,865,553
Disposal Group, Including Discontinued Operation, Accounts Payable					97,439
Disposal Group, Including Discontinued Operation, Other Liabilities, Current					59,482
Current liabilities					156,921
Disposal Group, Including Discontinued Operation, Deferred Tax Liabilities					90,641
Disposal Group, Including 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
non-controlling 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