Basis of Presentation and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Unless otherwise noted in this report, any description of “we,” “us,” or “our” includes Crocs, Inc. (“Crocs” or the “Company”) and its wholly-owned subsidiaries within our reportable operating segments and corporate operations. The Company is engaged in the design, development, manufacturing, worldwide marketing, and distribution of casual lifestyle footwear and accessories for men, women, and children. We strive to be the global leader in the sale of molded footwear featuring fun, comfort, color, and functionality. Our reportable operating segments include: the Americas, operating in North and South America; Asia Pacific, operating throughout Asia, Australia, New Zealand, Africa, and the Middle East; and Europe, operating throughout Europe and Russia.
Principles of Consolidation	The accompanying unaudited condensed consolidated interim financial statements include the Company’s accounts and those of its wholly-owned subsidiaries, and reflect all adjustments which are necessary for a fair statement of the financial position, results of operations, and cash flows for the periods presented in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”). Such unaudited interim condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the U.S. Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with U.S. GAAP have been condensed or omitted pursuant to such rules and regulations. The year-end condensed balance sheet data was derived from audited financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America. These unaudited condensed consolidated interim financial statements should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2016 (“Annual Report”), and have been prepared on a consistent basis with the accounting policies described in Note 1 of the Notes to the Audited Consolidated Financial Statements included in our Annual Report.
Seasonality of Business	Seasonality of Business Due to the seasonal nature of our footwear, which is more heavily focused on styles suitable for warmer weather, the Company’s business is typically affected by seasonal trends, with higher wholesale sales in its first and second quarters and higher retail sales in its second and third quarters. In addition, our quarterly results of operations may fluctuate significantly as a result of other factors, including general economic conditions or consumer confidence. Accordingly, the Company’s operating results and cash flows for the three and nine months ended September 30, 2017 are not necessarily indicative of the operating results and cash flows for any other quarter or for the full year.
Transactions with Affiliates	Transactions with Affiliates The Company receives services from three subsidiaries of Blackstone Capital Partners VI L.P. (“Blackstone”). Blackstone and certain of its permitted transferees currently beneficially own all the outstanding shares of the Company’s Series A Convertible Preferred Stock, which is convertible into approximately 16.1% of the Company’s common stock as of September 30, 2017. Blackstone also has the right to nominate two representatives to serve on the Company’s Board of Directors (the “Board”). Certain Blackstone subsidiaries provide various services to the Company, including inventory count, cybersecurity and consulting, and workforce management services. The Company paid $0.1 million and less than $0.1 million for the three months ended September 30, 2017 and 2016, respectively, and $0.6 million and $0.6 million for the nine months ended September 30, 2017 and 2016, respectively, for these services. Expenses related to these services are reported in ‘Selling, general and administrative expenses’ in the condensed consolidated statements of operations.
Research, Design and Development Expenses	Research, Design, and Development Expenses Research, design, and development expenses were $2.3 million and $3.7 million for the three months ended September 30, 2017 and 2016, respectively, and $7.4 million and $9.3 million for the nine months ended September 30, 2017 and 2016, respectively, and are reported in ‘Selling, general and administrative expenses’ in the condensed consolidated statements of operations.
Marketing, Advertising and Promotional Expenses	Marketing, Advertising, and Promotional Expenses Advertising production and promotion costs are expensed when the advertising is first run. Advertising communication costs are expensed in the periods that the communications occur. Certain of the Company’s promotional expenses result from payments under endorsement contracts. Payments under endorsement contracts are expensed on a straight-line basis over the related annual contract terms.
Recently Accounting Pronouncements	New Accounting Pronouncement Adopted Inventory Measurement In July 2015, the Financial Accounting Standards Board (“FASB”) issued authoritative guidance to measure in-scope inventory at the lower of cost or net realizable value. The Company adopted this guidance on January 1, 2017 on a prospective basis. The adoption did not have a significant effect on our consolidated financial position or results of operations. New Accounting Pronouncements Not Yet Adopted Stock Compensation Scope of Modification Accounting In May 2017, the FASB issued authoritative guidance intended to clarify those changes to terms and conditions of stock-based compensation awards that are required to be accounted for as modifications of existing stock-based awards. This guidance is to be applied prospectively and becomes effective for annual reporting periods beginning after December 15, 2017, including interim periods within those periods, with early adoption permitted during any interim period. The Company does not expect this standard will have a material impact on the Company’s consolidated financial statements. Clarifying the Definition of a Business In January 2017, the FASB issued authoritative guidance intended to clarify the definition of a business, for purposes of determining whether a business has been acquired or sold, and consequently whether transactions should be accounted for as acquisitions or disposals of a business or as acquisitions or disposals of assets. This guidance is to be applied prospectively and becomes effective for annual reporting periods beginning after December 15, 2017, including interim periods within those periods. The Company does not expect this standard to have a material impact on its consolidated financial statements. Statement of Cash Flows - Classification and Change in Cash In August 2016, the FASB issued authoritative guidance intended to clarify how entities should classify certain cash receipts and cash payments on the statement of cash flows. Further, in November 2016, the FASB issued guidance requiring that restricted cash be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. These updates are effective for annual reporting periods beginning after December 15, 2017, and interim periods within those annual periods, with early adoption permitted. The guidance should be applied retrospectively unless it is impractical to do so; in which case, the guidance should be applied prospectively as of the earliest date practicable. The Company does not expect this standard to have a material impact on its consolidated financial statements. Prepaid Stored-Value Products In March 2016, the FASB issued guidance related to the recognition of breakage for certain prepaid stored-value products. This update aligns recognition of the financial liabilities related to prepaid stored-value products (for example, prepaid gift cards), with Topic 606, Revenue from Contracts with Customers, for non-financial liabilities. In general, certain of these liabilities may be extinguished proportionally in earnings as redemptions occur, or when redemption is remote if issuers are not entitled to the unredeemed stored value. This standard is effective for annual periods (including interim periods) beginning after December 15, 2017, with early adoption permitted. The Company has elected the modified retrospective method of adoption. The Company does not expect this standard to have a material impact on its consolidated financial statements. Leases In February 2016, the FASB issued authoritative guidance intended to increase transparency and comparability among organizations by recognizing lease assets and liabilities on the balance sheet and disclosing key information about leasing arrangements. Under the new guidance, lessees will be required to recognize a right-of-use asset and a lease liability, measured on a discounted basis, at the commencement date for all leases with terms greater than twelve months. Additionally, this guidance will require disclosures to help investors and other financial statement users to better understand the amount, timing, and uncertainty of cash flows arising from leases, including qualitative and quantitative requirements. The guidance should be applied under a modified retrospective transition approach for leases existing at the beginning of the earliest comparative period presented in the adoption-period financial statements. Any leases that expire before the initial application date will not require any accounting adjustment. This guidance is effective for annual reporting periods beginning after December 15, 2018, including interim periods within those annual periods, with early adoption permitted. The Company will adopt this guidance beginning with the quarterly reporting period ending March 31, 2019. In July 2017, the Company established an implementation team and engaged external advisers to develop a multi-phase plan to assess the Company’s leasing arrangements, as well as any changes to accounting policies, processes or systems necessary to adopt the requirements of the new standard. The Company is evaluating the full impact this guidance will have on its consolidated financial statements, and expects that adoption will result in significant increases in lease-related assets and liabilities on its consolidated balance sheet. Revenue Recognition In May 2014, the FASB issued authoritative guidance related to new accounting requirements for the recognition of revenue from contracts with customers. The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled to in exchange for the goods or services. Subsequent to the release of this guidance, the FASB has issued additional updates intended to provide interpretive clarifications and to reduce the cost and complexity of applying the new revenue recognition standard both at transition and on an ongoing basis. The new standard and related amendments are effective for annual reporting periods beginning after December 15, 2017, and interim periods within those annual periods. Upon adoption of the new standard, the use of either a full retrospective or modified retrospective transition method is permitted. In December 2016, the Company established an implementation team and engaged external advisers to develop a multi-phase plan to assess the Company’s business and contracts, as well as any changes to accounting policies, processes or systems necessary to adopt the requirements of the new standard. The Company has elected the modified retrospective method of adoption. The Company has completed a review of its revenue contracts and terms and is finalizing its assessment regarding the effects of adoption of the new standard on its consolidated financial statements and disclosures. Concurrent with adoption, the Company will change its presentation of product returns in the condensed consolidated balance sheets by reporting an asset for the right to receive returned product and a return liability. In addition, customer payments received in advance of delivery will be reported as a contract liability in the Company’s condensed consolidated balance sheets. The Company is continuing its evaluation of the impact of any additional accounting and disclosure changes on its business processes, controls and systems. The Company will provide additional information regarding expected effects on its consolidated financial statements and disclosures in its next annual report. Other Pronouncements Other new pronouncements issued but not effective until after September 30, 2017 are not expected to have a material impact on the Company’s consolidated financial statements.
Derivatives Financial Instruments	The Company’s derivative instruments are recorded at fair value as a derivative asset or liability in the condensed consolidated balance sheets. The Company reports derivative instruments with the same counterparty on a net basis when a master netting arrangement is in place. Changes in fair value are recognized within ‘Foreign currency gain (loss), net’ in the condensed consolidated statements of operations. For the condensed consolidated statements of cash flows, the Company classifies cash flows from derivative instruments at settlement in the same category as the cash flows from the related hedged items within ‘Cash provided by operating activities.