The amount of cash payment net of holdback and floor plan financing related to a business acquisition.

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Amount of inventory purchases financed through floor plan related to business acquisition.

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Amount of accrued liabilities assumed at the acquisition date.

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Amount of deferred revenue and gains expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of tangible assets acquired at the acquisition date.

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Represents the amount of contracts in transit.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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Acquisitions - Assets (Liabilities) Acquired (Assumed) at Fair Value (Details) - USD ($) $ in Thousands			9 Months Ended
	Aug. 17, 2017	May 26, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Assets (liabilities) acquired (assumed) at fair value:
Goodwill			$ 389,087		$ 348,387
Cash paid for acquisition, net of cash acquired			$ 82,195	$ 345,140
Trademarks and trade names
Assets (liabilities) acquired (assumed) at fair value:
Estimated life (in years)			15 years
Websites
Assets (liabilities) acquired (assumed) at fair value:
Estimated life (in years)			10 years
Assets Or Stock Of Multiple Dealership Locations Acquired
Assets (liabilities) acquired (assumed) at fair value:
Cash and cash equivalents			$ 2,648
Contracts in Transit			103
Accounts receivable			103	1,306
Inventory			36,257	98,869
Prepaid expenses and other assets			79
Property and equipment			402	835
Other assets			48	72
Accounts payable			(64)
Accrued liabilities			(1,081)	(3,019)
Deferred revenues and gains			(168)
Total tangible net assets acquired			38,327	98,063
Intangible assets acquired			766	793
Goodwill			37,145	143,788
Purchase price			76,238	242,644
Cash and cash equivalents acquired			(2,648)
Cash paid for acquisition, net of cash acquired			73,590	242,644
Inventory purchases financed via floor plan			(29,365)	(79,321)
Cash payment net of floor plan financing			44,225	163,323
Assets Or Stock Of Multiple Dealership Locations Acquired \| Membership and customer lists
Assets (liabilities) acquired (assumed) at fair value:
Intangible assets acquired			766	793
Gander Mountain and Overton's
Assets (liabilities) acquired (assumed) at fair value:
Purchase Price		$ 35,400
TheHouse.com
Assets (liabilities) acquired (assumed) at fair value:
Non-cash consideration	$ (5,700)
Outdoor and Activity Sports Retail Businesses
Assets (liabilities) acquired (assumed) at fair value:
Cash and cash equivalents				501
Accounts receivable				159
Inventory			4,599	47,129
Prepaid expenses and other assets			76	1,169
Property and equipment			416	9,530
Accounts payable				(7,582)
Accrued liabilities			(359)	(1,990)
Other liabilities				(6,016)
Total tangible net assets acquired			4,732	42,900
Intangible assets acquired			318	35,329
Goodwill			3,580	31,509
Purchase price			8,630	109,738
Cash and cash equivalents acquired				(501)
Cash paid for acquisition, net of cash acquired			8,630	102,496
Non-cash consideration				(5,720)
Contingent consideration unpaid at June 30, 2017				(1,021)
Outdoor and Activity Sports Retail Businesses \| Membership and customer lists
Assets (liabilities) acquired (assumed) at fair value:
Intangible assets acquired				500
Outdoor and Activity Sports Retail Businesses \| Trademarks and trade names
Assets (liabilities) acquired (assumed) at fair value:
Intangible assets acquired			$ 318	28,839
Outdoor and Activity Sports Retail Businesses \| Websites
Assets (liabilities) acquired (assumed) at fair value:
Intangible assets acquired				$ 5,990