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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period, Additional Monthly Period

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period, Post Termination Threshold

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- Definition

Threshold Period Past Due for Delinquency Status of Financing Receivable

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- Definition

Threshold Period Past Due for Write-off of Financing Receivable, Initial Assessment Threshold

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No definition available.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 720
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-Section 50
-Paragraph 1
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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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- Definition

The amount of estimated penalties and interest accrued as of the balance sheet date arising from income tax examinations.

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- Definition

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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No definition available.

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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No definition available.

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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No definition available.

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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No definition available.

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- Definition

Amount after tax, before reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Summary of Significant Accounting Policies (Details)	12 Months Ended
Summary of Significant Accounting Policies (Details)	Dec. 31, 2017 USD ($) segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015	Jun. 30, 2015
Noncontrolling Interest [Line Items]
Number of operating segments \| segment	1
Number of reportable segments \| segment	1
Lines of credit amortization period	6 months
Threshold to consider a loan to be delinquent	1 day
Delinquency threshold to make initial assessment of charge off	90 days
Advertising costs	$ 15,000,000	$ 20,100,000	$ 22,500,000
Cumulative translation gain (loss)	327,000	(7,000)
Gain (loss) resulting from foreign exchange transactions	1,600,000	200,000	(1,300,000)
Income tax, penalties and interest accrued	$ 0	$ 0
Stock options
Noncontrolling Interest [Line Items]
Additional monthly vesting period	3 years
Expiration period	10 years
Period after employee's termination	90 days
Stock options \| Tranche one
Noncontrolling Interest [Line Items]
Vesting percentage	25.00%
Vesting period	1 year
Stock options \| Tranche two
Noncontrolling Interest [Line Items]
Vesting percentage	25.00%
Stock options \| Tranche three
Noncontrolling Interest [Line Items]
Vesting percentage	25.00%
Stock options \| Tranche four
Noncontrolling Interest [Line Items]
Vesting percentage	25.00%
RSUs
Noncontrolling Interest [Line Items]
Vesting period	4 years
RSUs \| Tranche one
Noncontrolling Interest [Line Items]
Vesting percentage	25.00%
RSUs \| Tranche two
Noncontrolling Interest [Line Items]
Vesting percentage	25.00%
RSUs \| Tranche three
Noncontrolling Interest [Line Items]
Vesting percentage	25.00%
RSUs \| Tranche four
Noncontrolling Interest [Line Items]
Vesting percentage	25.00%
On Deck Australia
Noncontrolling Interest [Line Items]
Ownership percentage					55.00%
Ownership percentage by non-affiliated parties					45.00%
Lancelot QBFOD LLC
Noncontrolling Interest [Line Items]
Ownership percentage				67.00%
Ownership percentage by non-affiliated parties				33.00%
Accounting Standards Update 2015-03 \| Other Noncurrent Assets
Noncontrolling Interest [Line Items]
Deferred debt issuance costs			(4,200,000)
Accounting Standards Update 2015-03 \| Long-term Debt
Noncontrolling Interest [Line Items]
Deferred debt issuance costs			$ (4,200,000)
Capitalized internal-use software
Noncontrolling Interest [Line Items]
Estimated useful life	36 months