Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Advances Against Contracts

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- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Auction Proceeds Payable

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- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Income Tax Receivable

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- Definition

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

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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- Definition

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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- Definition

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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- Definition

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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- Definition

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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- Definition

Amount, after allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences and carryforwards acquired at the acquisition date, classified as noncurrent.

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- Definition

Amount of deferred tax liability attributable to taxable temporary difference assumed at the acquisition date that are classified as noncurrent.

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- Definition

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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- Definition

The amount of inventory recognized as of the acquisition date.

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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- Definition

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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- Definition

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

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- Definition

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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Business Combinations (Schedule of Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Thousands		12 Months Ended
	May 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Goodwill acquired on acquisition		$ 671,594	$ 670,922	$ 97,537
Technology [Member]
Business Acquisition [Line Items]
Amortization life		7 years
Iron Planet Holdings Inc. [Member]
Business Acquisition [Line Items]
Purchase price	$ 776,474
Cash and cash equivalents	95,626
Restricted cash	3,000
Trade and other receivables	13,021
Inventory	600
Advances against auction contracts	4,623
Prepaid expenses and deposits	1,645
Income taxes receivable	55
Property, plant and equipment	2,381
Other non-current assets	2,551
Deferred tax assets	1,497
Intangible assets	188,000
Auction proceeds payable	63,616
Trade and other payables	15,540
Deferred tax liabilities	25,935
Fair value of identifiable net assets acquired	207,908
Goodwill acquired on acquisition	$ 568,566
Minimum [Member] \| Customer Relationships [Member]
Business Acquisition [Line Items]
Amortization life		6 years
Maximum [Member] \| Customer Relationships [Member]
Business Acquisition [Line Items]
Amortization life		13 years