Basis of Presentation and Description of Company	6 Months Ended
Jun. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Description of Company	1. Basis of Presentation and Description of Company PCM, Inc. is a leading multi-vendor provider of technology solutions, including hardware products, software and services, offered through our dedicated sales force and field service teams and direct marketing channels. Since our founding in 1987, we have served our customers by offering products and services from vendors such as Apple, Cisco, Dell, Hewlett Packard Enterprise, HP Inc., Ingram Micro, Lenovo, Microsoft and Tech Data. We add additional value by incorporating products and services into comprehensive solutions. Our sales and marketing efforts allow our vendor partners to reach multiple customer segments including small, medium and enterprise businesses, state, local and federal governments and educational institutions. We have prepared the unaudited condensed consolidated financial statements included herein pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and in conformity with accounting principles generally accepted in the United States of America, or GAAP, which requires us to make estimates and assumptions that affect amounts reported herein. We base our estimates and assumptions on historical experience and on various other factors that we believe to be reasonable under the circumstances. Due to the inherent uncertainty involved in making estimates, our actual results reported in future periods may be affected by changes in those estimates. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations for interim financial reporting. In the opinion of management, all adjustments, consisting only of normal recurring items which are necessary for a fair presentation, have been included. The results for interim periods are not necessarily indicative of the results that may be expected for any other interim period or for the full year. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2016 filed with the SEC. In connection with our entrance into the United Kingdom (“UK”) market in the first quarter of 2017, we formed a new operating segment called United Kingdom. As a result, we currently operate in four reportable segments: Commercial, Public Sector, Canada and United Kingdom. Our reportable operating segments are primarily aligned based upon our reporting of results as used by our chief operating decision maker in evaluating the operating results and performance of our company. We include corporate related expenses such as legal, accounting, information technology, product management and other administrative costs that are not otherwise included in our reportable operating segments in Corporate & Other. We sell primarily to customers in the United States and Canada, and maintain offices in the United States and Canada, as well as in the Philippines and the United Kingdom. In the three months ended June 30, 2017, we generated approximately 78% of our revenue in our Commercial segment, 14% of our revenue in our Public Sector segment and 8% of our revenue in our Canada segment. PCM UK commenced its sales operations in May 2017 and our United Kingdom segment net sales were $0.4 million in the three months ended June 30, 2017. Our Commercial segment sells complex technology solutions to commercial businesses in the United States, using multiple sales channels, including a field relationship-based selling model, an outbound phone based sales force, a field services organization and online extranets. Our Public Sector segment consists of sales made primarily to federal, state and local governments, as well as educational institutions. The Public Sector segment utilizes an outbound phone and field relationship-based selling model, as well as contract and bid business development teams and an online extranet. Our Canada segment consists of sales made to customers in the Canadian market beginning as of the respective dates of our acquisition of Acrodex and certain assets of Systemax in October and December 2015, respectively. Our United Kingdom segment consists of results of our new subsidiary, PCM Technology Solutions UK, Ltd. (“PCM UK”), which serves as our hub for the UK and the rest of Europe. Beginning in the first quarter of 2017, our financial results do not consolidate the financial results of sales made under some customer contracts we purchased in the En Pointe acquisition, which are now held by a partner which qualifies for certification as a minority and women owned business in accordance with customer supplier diversity policies. We hold a 49% passive equity interest in this partner and we have accounted for our investment in this partner using the equity method of accounting beginning in the first quarter of 2017. We refer to this entity as the non-controlled entity or NCE. We record our results from our 49% equity interest in the NCE’s operations as “Equity income from unconsolidated affiliate” in our consolidated statement of operations.

Basis of Presentation and Description of Company

6 Months Ended

Jun. 30, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Basis of Presentation and Description of Company

1. Basis of Presentation and Description of Company

PCM, Inc. is a leading multi-vendor provider of technology solutions, including hardware products, software and services, offered through our dedicated sales force and field service teams and direct marketing channels. Since our founding in 1987, we have served our customers by offering products and services from vendors such as Apple, Cisco, Dell, Hewlett Packard Enterprise, HP Inc., Ingram Micro, Lenovo, Microsoft and Tech Data. We add additional value by incorporating products and services into comprehensive solutions. Our sales and marketing efforts allow our vendor partners to reach multiple customer segments including small, medium and enterprise businesses, state, local and federal governments and educational institutions.

We have prepared the unaudited condensed consolidated financial statements included herein pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”) and in conformity with accounting principles generally accepted in the United States of America, or GAAP, which requires us to make estimates and assumptions that affect amounts reported herein. We base our estimates and assumptions on historical experience and on various other factors that we believe to be reasonable under the circumstances. Due to the inherent uncertainty involved in making estimates, our actual results reported in future periods may be affected by changes in those estimates. Certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations for interim financial reporting. In the opinion of management, all adjustments, consisting only of normal recurring items which are necessary for a fair presentation, have been included. The results for interim periods are not necessarily indicative of the results that may be expected for any other interim period or for the full year. These unaudited condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2016 filed with the SEC.

In connection with our entrance into the United Kingdom (“UK”) market in the first quarter of 2017, we formed a new operating segment called United Kingdom. As a result, we currently operate in four reportable segments: Commercial, Public Sector, Canada and United Kingdom. Our reportable operating segments are primarily aligned based upon our reporting of results as used by our chief operating decision maker in evaluating the operating results and performance of our company. We include corporate related expenses such as legal, accounting, information technology, product management and other administrative costs that are not otherwise included in our reportable operating segments in Corporate & Other.

We sell primarily to customers in the United States and Canada, and maintain offices in the United States and Canada, as well as in the Philippines and the United Kingdom. In the three months ended June 30, 2017, we generated approximately 78% of our revenue in our Commercial segment, 14% of our revenue in our Public Sector segment and 8% of our revenue in our Canada segment. PCM UK commenced its sales operations in May 2017 and our United Kingdom segment net sales were $0.4 million in the three months ended June 30, 2017.

Our Commercial segment sells complex technology solutions to commercial businesses in the United States, using multiple sales channels, including a field relationship-based selling model, an outbound phone based sales force, a field services organization and online extranets.

Our Public Sector segment consists of sales made primarily to federal, state and local governments, as well as educational institutions. The Public Sector segment utilizes an outbound phone and field relationship-based selling model, as well as contract and bid business development teams and an online extranet.

Our Canada segment consists of sales made to customers in the Canadian market beginning as of the respective dates of our acquisition of Acrodex and certain assets of Systemax in October and December 2015, respectively.

Our United Kingdom segment consists of results of our new subsidiary, PCM Technology Solutions UK, Ltd. (“PCM UK”), which serves as our hub for the UK and the rest of Europe.

Beginning in the first quarter of 2017, our financial results do not consolidate the financial results of sales made under some customer contracts we purchased in the En Pointe acquisition, which are now held by a partner which qualifies for certification as a minority and women owned business in accordance with customer supplier diversity policies. We hold a 49% passive equity interest in this partner and we have accounted for our investment in this partner using the equity method of accounting beginning in the first quarter of 2017. We refer to this entity as the non-controlled entity or NCE. We record our results from our 49% equity interest in the NCE’s operations as “Equity income from unconsolidated affiliate” in our consolidated statement of operations.