Basis of Presentation and Principles of Consolidation	9 Months Ended
Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated balance sheet as of September 30, 2016, the unaudited condensed consolidated statements of operations and comprehensive income for the three and nine months ended September 30, 2016 and 2015, and the unaudited condensed consolidated statements of cash flows for the nine months ended September 30, 2016 and 2015, have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission (“SEC”) for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by generally accepted accounting principles in the U.S. ("GAAP") can be condensed or omitted. The condensed consolidated balance sheet as of December 31, 2015 has been derived from the Company’s audited financial statements, which are included in its 2015 Annual Report on Form 10-K, filed with the SEC on February 26, 2016. The unaudited condensed consolidated interim financial statements should be read in conjunction with the Company’s audited consolidated financial statements in its Annual Report on Form 10-K, for the year ended December 31, 2015. The unaudited condensed consolidated interim financial statements include all adjustments necessary for the fair presentation of its consolidated results of operations, financial position, comprehensive income and cash flows. Results for the interim periods are not necessarily indicative of results to be expected for the full year or any other future periods. All intercompany balances and transactions have been eliminated in the unaudited condensed consolidated interim financial statements. On May 25, 2016, the Board of Directors approved a two-for-one stock split of the Company’s outstanding common stock, effected through a stock dividend. The additional shares were distributed on June 27, 2016 to stockholders of record at the close of business on June 9, 2016. All references made to share or per share amounts in the accompanying condensed consolidated interim financial statements and applicable disclosures have been retroactively adjusted to reflect this two-for-one stock split for all periods presented. During the three months ended September 30, 2016, the Company identified an error in the presentation of borrowings and repayments of the Company’s revolving credit facility in the previously issued condensed consolidated statements of cash flows. The Company corrected the presentation of borrowings and repayments on the revolving credit facility to reflect them on a gross basis, rather than on a net basis, within the financing activities section of the condensed consolidated statements of cash flows. The correction did not change previously reported total cash provided by (or used from) financing activities. Amounts for prior periods included in the consolidated financial statements have been reclassified to conform to the current period presentation. Concentration of Credit Risks Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of cash investments, accounts receivable and other receivables. The Company places its cash and cash equivalents in short-term instruments with high quality financial institutions and limits the amount of credit exposure in any one financial instrument. The Company pursues amounts and incentives due from vendors in the normal course of business and is often allowed to deduct these amounts and incentives from payments made to vendors. A credit review is completed for new customers and ongoing credit evaluations of each customer’s financial condition are performed periodically, with reserves maintained for potential credit losses. Credit limits given to customers are based on a risk assessment of their ability to pay and other factors. Accounts receivable are typically not collateralized, but the Company may require prepayments or other guarantees whenever deemed necessary. The Company had two customers that each accounted for more than 10% of the net sales during the three and nine months ended September 30, 2016. These customers, Murphy U.S.A., which the Company began servicing in the first quarter of 2016, and Alimentation Couche-Tard, Inc. (“Couche-Tard”), together represented approximately 23.2% and 23.3% of the Company’s net sales for the three and nine months ended September 30, 2016, respectively. Couche-Tard accounted for approximately 13.8% and 14.3% of the Company's net sales for the three and nine months ended September 30, 2015, respectively. No single customer accounted for 10% or more of the Company’s accounts receivables as of September 30, 2016 or December 31, 2015. Recent Accounting Standards or Updates Not Yet Effective On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), to supersede nearly all existing revenue recognition guidance under GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. This standard is effective for the Company beginning in 2018 and allows for either full retrospective adoption or modified retrospective adoption with the cumulative effect recognized at the date of initial adoption. The Company is currently evaluating the impact of the adoption of ASU 2014-09 on its consolidated financial statements. On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”), which supersedes existing lease guidance. The new guidance increases transparency by requiring lessees to recognize right-of-use assets and corresponding lease liabilities on the balance sheet. This standard is effective for annual periods beginning after December 15, 2018, although early adoption is permitted. The Company is currently evaluating the impact ASU 2016-02 will have on its consolidated financial statements. On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”). The new guidance simplifies several aspects of how companies account for share-based compensation, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statements of cash flows. ASU 2016-09 is effective for annual periods beginning after December 15, 2016, although early adoption is permitted. The Company is currently evaluating the impact ASU 2016-09 will have on its consolidated financial statements. On June 16, 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). The new guidance replaces the current incurred loss impairment approach with a methodology that incorporates all expected credit loss estimates, resulting in more timely recognition of losses. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, although early adoption is permitted. The Company is currently evaluating the impact ASU 2016-13 will have on its consolidated financial statements. On August 26, 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). The new guidance addresses eight specific cash flow presentation and classification issues in the statement of cash flows to reduce existing diversity in practice. ASU 2016-15 is effective for annual periods beginning after December 15, 2017, although early adoption is permitted. The Company is currently evaluating the impact ASU 2016-15 will have on its consolidated financial statements.

Basis of Presentation and Principles of Consolidation

The accompanying unaudited condensed consolidated balance sheet as of September 30, 2016, the unaudited condensed consolidated statements of operations and comprehensive income for the three and nine months ended September 30, 2016 and 2015, and the unaudited condensed consolidated statements of cash flows for the nine months ended September 30, 2016 and 2015, have been prepared in accordance with the requirements of the U.S. Securities and Exchange Commission (“SEC”) for interim reporting. As permitted under those rules, certain footnotes and other financial information that are normally required by generally accepted accounting principles in the U.S. ("GAAP") can be condensed or omitted. The condensed consolidated balance sheet as of December 31, 2015 has been derived from the Company’s audited financial statements, which are included in its 2015 Annual Report on Form 10-K, filed with the SEC on February 26, 2016.

The unaudited condensed consolidated interim financial statements should be read in conjunction with the Company’s audited consolidated financial statements in its Annual Report on Form 10-K, for the year ended December 31, 2015.

The unaudited condensed consolidated interim financial statements include all adjustments necessary for the fair presentation of its consolidated results of operations, financial position, comprehensive income and cash flows. Results for the interim periods are not necessarily indicative of results to be expected for the full year or any other future periods. All intercompany balances and transactions have been eliminated in the unaudited condensed consolidated interim financial statements.

On May 25, 2016, the Board of Directors approved a two-for-one stock split of the Company’s outstanding common stock, effected through a stock dividend. The additional shares were distributed on June 27, 2016 to stockholders of record at the close of business on June 9, 2016. All references made to share or per share amounts in the accompanying condensed consolidated interim financial statements and applicable disclosures have been retroactively adjusted to reflect this two-for-one stock split for all periods presented.

During the three months ended September 30, 2016, the Company identified an error in the presentation of borrowings and repayments of the Company’s revolving credit facility in the previously issued condensed consolidated statements of cash flows. The Company corrected the presentation of borrowings and repayments on the revolving credit facility to reflect them on a gross basis, rather than on a net basis, within the financing activities section of the condensed consolidated statements of cash flows. The correction did not change previously reported total cash provided by (or used from) financing activities.

Amounts for prior periods included in the consolidated financial statements have been reclassified to conform to the current period presentation.

Concentration of Credit Risks

Financial instruments, which potentially subject the Company to concentrations of credit risk, consist principally of cash investments, accounts receivable and other receivables. The Company places its cash and cash equivalents in short-term instruments with high quality financial institutions and limits the amount of credit exposure in any one financial instrument. The Company pursues amounts and incentives due from vendors in the normal course of business and is often allowed to deduct these amounts and incentives from payments made to vendors.

A credit review is completed for new customers and ongoing credit evaluations of each customer’s financial condition are performed periodically, with reserves maintained for potential credit losses. Credit limits given to customers are based on a risk assessment of their ability to pay and other factors. Accounts receivable are typically not collateralized, but the Company may require prepayments or other guarantees whenever deemed necessary.

The Company had two customers that each accounted for more than 10% of the net sales during the three and nine months ended September 30, 2016. These customers, Murphy U.S.A., which the Company began servicing in the first quarter of 2016, and Alimentation Couche-Tard, Inc. (“Couche-Tard”), together represented approximately 23.2% and 23.3% of the Company’s net sales for the three and nine months ended September 30, 2016, respectively. Couche-Tard accounted for approximately 13.8% and 14.3% of the Company's net sales for the three and nine months ended September 30, 2015, respectively. No single customer accounted for 10% or more of the Company’s accounts receivables as of September 30, 2016 or December 31, 2015.

Recent Accounting Standards or Updates Not Yet Effective

On May 28, 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2014-09, Revenue from Contracts with Customers (Topic 606) (“ASU 2014-09”), to supersede nearly all existing revenue recognition guidance under GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration that is expected to be received for those goods or services. This standard is effective for the Company beginning in 2018 and allows for either full retrospective adoption or modified retrospective adoption with the cumulative effect recognized at the date of initial adoption. The Company is currently evaluating the impact of the adoption of ASU 2014-09 on its consolidated financial statements.

On February 25, 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) (“ASU 2016-02”), which supersedes existing lease guidance. The new guidance increases transparency by requiring lessees to recognize right-of-use assets and corresponding lease liabilities on the balance sheet. This standard is effective for annual periods beginning after December 15, 2018, although early adoption is permitted. The Company is currently evaluating the impact ASU 2016-02 will have on its consolidated financial statements.

On March 30, 2016, the FASB issued ASU No. 2016-09, Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting (“ASU 2016-09”). The new guidance simplifies several aspects of how companies account for share-based compensation, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statements of cash flows. ASU 2016-09 is effective for annual periods beginning after December 15, 2016, although early adoption is permitted. The Company is currently evaluating the impact ASU 2016-09 will have on its consolidated financial statements.

On June 16, 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”). The new guidance replaces the current incurred loss impairment approach with a methodology that incorporates all expected credit loss estimates, resulting in more timely recognition of losses. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, although early adoption is permitted. The Company is currently evaluating the impact ASU 2016-13 will have on its consolidated financial statements.

On August 26, 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments (“ASU 2016-15”). The new guidance addresses eight specific cash flow presentation and classification issues in the statement of cash flows to reduce existing diversity in practice. ASU 2016-15 is effective for annual periods beginning after December 15, 2017, although early adoption is permitted. The Company is currently evaluating the impact ASU 2016-15 will have on its consolidated financial statements.