Insight Enterprises (NSIT) 10-K 22 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 15, 2019	Jun. 29, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	NSIT
Entity Registrant Name	INSIGHT ENTERPRISES INC
Entity Central Index Key	932,696
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		35,502,671
Entity Public Float			$ 1,710,394,927

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 142,655	$ 105,831
Accounts receivable, net	1,931,736	1,814,560
Inventories	148,503	194,529
Inventories not available for sale		36,956
Other current assets	115,683	152,467
Total current assets	2,338,577	2,304,343
Property and equipment, net	72,954	75,252
Goodwill	166,841	131,431
Intangible assets, net	112,179	100,778
Deferred income taxes	7,967	17,064
Other assets	77,429	56,783
Total assets	2,775,947	2,685,651
Current liabilities:
Accounts payable—trade	978,104	899,075
Accounts payable—inventory financing facility	304,130	319,468
Accrued expenses and other current liabilities	190,733	175,860
Current portion of long-term debt	1,395	16,592
Deferred revenue	62,300	88,979
Total current liabilities	1,536,662	1,499,974
Long-term debt	195,525	296,576
Deferred income taxes	683	717
Other liabilities	56,088	44,915
Total liabilities	1,788,958	1,842,182
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value, 3,000 shares authorized; no shares issued
Common stock, $0.01 par value, 100,000 shares authorized; 35,482 and 35,829 shares issued and outstanding, respectively	355	358
Additional paid-in capital	323,622	317,155
Retained earnings	704,665	550,220
Accumulated other comprehensive loss – foreign currency translation adjustments	(41,653)	(24,264)
Total stockholders’ equity	986,989	843,469
Total liabilities and stockholders' equity	$ 2,775,947	$ 2,685,651

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	3,000,000	3,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	35,482,000	35,829,000
Common stock, shares outstanding	35,482,000	35,829,000

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales:
Total net sales	$ 1,749,046	$ 1,747,726	$ 1,840,870	$ 1,742,494	$ 1,784,075	$ 1,757,973	$ 1,684,032	$ 1,477,543	$ 7,080,136	$ 6,703,623	$ 5,485,515
Costs of goods sold:
Total costs of goods sold	1,494,882	1,512,812	1,576,493	1,502,231	1,551,192	1,531,892	1,432,653	1,269,316	6,086,418	5,785,053	4,742,413
Gross profit	254,164	234,914	264,377	240,263	232,883	226,081	251,379	208,227	993,718	918,570	743,102
Operating expenses:
Selling and administrative expenses	194,790	184,095	189,464	188,180	184,554	180,390	180,752	177,632	756,529	723,328	585,243
Severance and restructuring expenses	715	683	382	1,644	2,791	494	1,022	4,695	3,424	9,002	4,580
Loss on sale of foreign entity						3,646				3,646
Acquisition-related expenses		188	94			106	276	2,947	282	3,329	4,447
Earnings from operations	58,659	49,948	74,437	50,439	45,538	41,445	69,329	22,953	233,483	179,265	148,832
Non-operating (income) expense:
Interest income	(422)	(330)	(170)	(153)	(346)	(227)	(205)	(431)	(1,075)	(1,209)	(1,066)
Interest expense	5,563	6,132	5,102	6,015	5,360	5,555	4,326	3,933	22,812	19,174	8,628
Net foreign currency exchange (gain) loss	(1,517)	539	(275)	(245)	(117)	341	251	380	(1,498)	855	522
Other expense, net	323	393	324	302	367	339	326	315	1,342	1,347	1,290
Earnings before income taxes	54,712	43,214	69,456	44,520	40,274	35,437	64,631	18,756	211,902	159,098	139,458
Income tax expense	7,671	11,060	17,977	11,517	26,106	13,025	24,376	4,908	48,225	68,415	54,768
Net earnings	$ 47,041	$ 32,154	$ 51,479	$ 33,003	$ 14,168	$ 22,412	$ 40,255	$ 13,848	$ 163,677	$ 90,683	$ 84,690
Net earnings per share:
Basic	$ 1.33	$ 0.91	$ 1.45	$ 0.92	$ 0.40	$ 0.63	$ 1.13	$ 0.39	$ 4.60	$ 2.54	$ 2.35
Diluted	$ 1.31	$ 0.89	$ 1.44	$ 0.91	$ 0.39	$ 0.62	$ 1.11	$ 0.38	$ 4.55	$ 2.50	$ 2.32
Shares used in per share calculations:
Basic	35,480	35,468	35,483	35,913	35,809	35,787	35,765	35,602	35,586	35,741	36,102
Diluted	35,999	35,957	35,815	36,263	36,272	36,203	36,169	36,185	36,009	36,207	36,438
Products [Member]
Net sales:
Total net sales									$ 6,249,938	$ 6,038,744	$ 4,997,263
Costs of goods sold:
Total costs of goods sold									5,711,400	5,512,402	4,571,462
Services [Member]
Net sales:
Total net sales									830,198	664,879	488,252
Costs of goods sold:
Total costs of goods sold									$ 375,018	$ 272,651	$ 170,951

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net earnings	$ 163,677	$ 90,683	$ 84,690
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	(17,389)	31,835	(16,063)
Total comprehensive income	$ 146,288	$ 122,518	$ 68,627

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings [Member]
Beginning Balance at Dec. 31, 2015	$ 685,742	$ 371		$ 316,686	$ (40,036)	$ 408,721
Beginning Balance, Shares at Dec. 31, 2015		37,106
Issuance of common stock under employee stock plans, net of shares withheld for payroll taxes, Value	(2,219)	$ 3		(2,222)
Issuance of common stock under employee stock plans, net of shares withheld for payroll taxes, Shares		269
Stock-based compensation expense	11,058			11,058
Tax benefit from stock-based compensation	235			235
Repurchase of treasury stock, Amount	(50,000)		$ (50,000)
Repurchase of treasury stock, Shares			(1,891)
Retirement of treasury stock, Amount		$ (19)	$ 50,000	(16,107)		(33,874)
Retirement of treasury stock, Shares		(1,891)	1,891
Foreign currency translation adjustments, net of tax	(16,063)				(16,063)
Net earnings	84,690					84,690
Ending Balance at Dec. 31, 2016	713,443	$ 355		309,650	(56,099)	459,537
Ending Balance, Shares at Dec. 31, 2016		35,484
Issuance of common stock under employee stock plans, net of shares withheld for payroll taxes, Value	(5,318)	$ 3		(5,321)
Issuance of common stock under employee stock plans, net of shares withheld for payroll taxes, Shares		345
Stock-based compensation expense	12,826			12,826
Foreign currency translation adjustments, net of tax	31,835				31,835
Net earnings	90,683					90,683
Ending Balance at Dec. 31, 2017	843,469	$ 358		317,155	(24,264)	550,220
Ending Balance, Shares at Dec. 31, 2017		35,829
Cumulative effect of accounting change	7,176					7,176
Issuance of common stock under employee stock plans, net of shares withheld for payroll taxes, Value	(3,230)	$ 3		(3,233)
Issuance of common stock under employee stock plans, net of shares withheld for payroll taxes, Shares		345
Stock-based compensation expense	15,355			15,355
Repurchase of treasury stock, Amount	(22,069)		$ (22,069)
Repurchase of treasury stock, Shares			(641)
Retirement of treasury stock, Amount		$ (6)	$ 22,069	(5,655)		(16,408)
Retirement of treasury stock, Shares		(641)	641
Foreign currency translation adjustments, net of tax	(17,389)				(17,389)
Net earnings	163,677					163,677
Ending Balance at Dec. 31, 2018	$ 986,989	$ 355		$ 323,622	$ (41,653)	$ 704,665
Ending Balance, Shares at Dec. 31, 2018		35,482

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net earnings	$ 163,677,000	$ 90,683,000	$ 84,690,000
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization of property and equipment	21,721,000	25,787,000	27,493,000
Amortization of intangible assets	15,737,000	16,812,000	10,637,000
Provision for losses on accounts receivable	4,776,000	5,245,000	2,452,000
Write-downs of inventories	2,912,000	2,776,000	2,934,000
Write-off of property and equipment	393,000	418,000	0
Non-cash stock-based compensation	15,355,000	12,826,000	11,058,000
Deferred income taxes	9,126,000	19,139,000	10,517,000
Loss on sale of foreign entity		3,646,000
Loss on extinguishment of debt	624,000
Gain on sale of real estate			(338,000)
Changes in assets and liabilities:
Increase in accounts receivable	(46,883,000)	(208,065,000)	(168,966,000)
Decrease (increase) in inventories	46,534,000	(14,046,000)	(50,712,000)
Decrease (increase) in other assets	12,424,000	3,342,000	(50,181,000)
Increase (decrease) in accounts payable	29,844,000	(237,457,000)	193,582,000
Increase (decrease) in deferred revenue	9,178,000	(27,184,000)	10,633,000
Increase (decrease) in accrued expenses and other liabilities	7,229,000	(988,000)	12,278,000
Net cash provided by (used in) operating activities	292,647,000	(307,066,000)	96,077,000
Cash flows from investing activities:
Acquisitions, net of cash and cash equivalents acquired	(74,938,000)	(186,932,000)	(10,297,000)
Purchases of property and equipment	(17,251,000)	(19,230,000)	(12,266,000)
Proceeds from sale of foreign entity	479,000	1,517,000
Proceeds from sale of real estate			1,378,000
Net cash used in investing activities	(91,710,000)	(204,645,000)	(21,185,000)
Cash flows from financing activities:
Borrowings on senior revolving credit facility	569,232,000	1,151,216,000	772,218,000
Repayments on senior revolving credit facility	(686,732,000)	(1,033,716,000)	(772,218,000)
Borrowings on accounts receivable securitization financing facility	3,357,000,000	3,961,389,000	2,802,000,000
Repayments on accounts receivable securitization financing facility	(3,188,000,000)	(3,975,889,000)	(2,851,500,000)
Borrowings under Term Loan A		175,000,000
Repayments under Term Loan A	(166,250,000)	(8,750,000)
Repayments under other financing agreements	(2,372,000)	(5,636,000)	(1,309,000)
Payments on capital lease obligations	(999,000)	(1,089,000)	(445,000)
Net (repayments) borrowings under inventory financing facility	(15,338,000)	141,037,000	48,603,000
Payment of debt issuance costs	(270,000)	(1,123,000)	(3,360,000)
Payment of payroll taxes on stock-based compensation through shares withheld	(3,230,000)	(5,318,000)	(2,219,000)
Repurchases of common stock	(22,069,000)		(50,000,000)
Net cash (used in) provided by financing activities	(159,028,000)	397,121,000	(58,230,000)
Foreign currency exchange effect on cash, cash equivalents and restricted cash balances	(5,061,000)	16,089,000	(1,937,000)
Increase (decrease) in cash, cash equivalents and restricted cash	36,848,000	(98,501,000)	14,725,000
Cash, cash equivalents and restricted cash at beginning of year	107,445,000	205,946,000	191,221,000
Cash, cash equivalents and restricted cash at end of year	$ 144,293,000	$ 107,445,000	$ 205,946,000

Operations and Summary of Signi

Operations and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Operations and Summary of Significant Accounting Policies	(1) Operations and Summary of Significant Accounting Policies Description of Business We empower organizations of all sizes with Intelligent Technology Solutions TM Operating Segment Geography North America United States and Canada EMEA Europe, Middle East and Africa APAC Asia-Pacific Our offerings in North America and certain countries in EMEA and APAC include hardware, software and services. Our offerings in the remainder of our EMEA and APAC segments are largely software and certain software-related services. Acquisitions Effective August 1, 2018, we acquired Cardinal Solutions Group, Inc. (“Cardinal”), a digital solutions provider, for a purchase price, net of cash acquired, of approximately $78,800,000, including the final working capital adjustment and estimated tax adjustment to be paid in future periods. The acquisition was funded using cash on hand. Effective September 26, 2017, we acquired Caase Group B.V. (referred to herein as, “Caase.com”), a Dutch cloud service provider, for a purchase price, net of cash acquired, of approximately $6,038,000. The acquisition was funded using cash on hand. Effective January 6, 2017, we acquired Datalink Corporation (“Datalink”), a leading provider of IT services and enterprise data center solutions based in Eden Prairie, Minnesota, for a cash purchase price of $257,456,000, which included cash and cash equivalents acquired of $76,597,000. The acquisition was funded using cash on hand and borrowings under our revolving facility in the form of an incremental Term Loan A (“TLA”). Effective September 1, 2016, we acquired Ignia Pty Ltd (“Ignia”), a business technology consulting and managed services provider headquartered in Perth, Australia, with an additional office in Melbourne, for a cash purchase price, net of cash acquired, of approximately $10,804,000. The acquisition was funded using cash on hand. Our results of operations include the results of Cardinal, Caase.com, Datalink and Ignia from their respective acquisition dates. (See Note 20 for a discussion of our acquisitions). Principles of Consolidation and Presentation The consolidated financial statements include the accounts of Insight Enterprises, Inc. and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. References to “the Company,” “Insight,” “we,” “us,” “our” and other similar words refer to Insight Enterprises, Inc. and its consolidated subsidiaries, unless the context suggests otherwise. Business Combinations The Company accounts for all business combinations using the acquisition method of accounting, which allocates the fair value of the purchase consideration to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values. The excess of the purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. When determining the fair values of assets acquired and liabilities assumed, management makes estimates and assumptions. Initial purchase price allocations are subject to revision within the measurement period, not to exceed one year from the date of acquisition. Acquisition-related expenses and transaction costs associated with business combinations are expensed as incurred. Use of Estimates The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements. Additionally, these estimates and assumptions affect the reported amounts of net sales and expenses during the reporting period. Actual results could differ from those estimates. On an ongoing basis, we evaluate our estimates, including those related to sales recognition, anticipated achievement levels under partner funding programs, assumptions related to stock-based compensation valuation, allowances for doubtful accounts, valuation of inventories, litigation-related obligations, valuation allowances for deferred tax assets and impairment of long-lived assets, including purchased intangibles and goodwill, if indicators of potential impairment exist. Cash, Cash Equivalents and Restricted Cash We consider all highly liquid investments with maturities at the date of purchase of three months or less to be cash equivalents. Book overdrafts represent the amount by which outstanding checks issued, but not yet presented to our banks for disbursement, exceed balances on deposit in applicable bank accounts and a legal right of offset with our positive cash balances in other financial institution accounts does not exist. Our book overdrafts, which are not directly linked to a credit facility or other bank overdraft arrangement, do not result in an actual bank financing, but rather constitute normal unpaid trade payables at the end of a reporting period. These amounts are included within our accounts payable balance in our consolidated balance sheets. The changes in these book overdrafts are included within the changes in accounts payable line item as a component of cash flows from operating activities in our consolidated statements of cash flows. Restricted cash generally includes any cash that is restricted as to withdrawal or usage. These amounts are included with cash and cash equivalents on the consolidated statement of cash flows. All cash receipts/payments with third parties directly to/from restricted cash accounts are reported as an operating, investing or financing cash flow, based on the nature of the transaction. Allowance for Doubtful Accounts We establish an allowance for doubtful accounts to reflect our best estimate of probable losses inherent in our accounts receivable balance. The allowance is based on our evaluation of the aging of the receivables, historical write-offs and the current economic environment. We write off individual accounts against the reserve when we no longer believe that it is probable that we will collect the receivable because we become aware of a client’s or partner’s inability to meet its financial obligations. Such awareness may be as a result of bankruptcy filings, or deterioration in the client’s or partner’s operating results or financial position. Inventories We state inventories, principally purchased IT hardware, at the lower of weighted average cost (which approximates cost under the first-in, first-out method) or net realizable value. We evaluate inventories for excess, obsolescence or other factors that may render inventories unmarketable at normal margins. Write-downs are recorded so that inventories reflect the approximate net realizable value and take into account contractual provisions with our partners governing price protection, stock rotation and return privileges relating to obsolescence. Because of the large number of transactions and the complexity of managing the price protection and stock rotation process, estimates are made regarding write-downs of the carrying amount of inventories. Additionally, assumptions about future demand, market conditions and decisions by manufacturers/publishers to discontinue certain products or product lines can affect our decision to write down inventories. Inventories not available for sale relate to product sales transactions in which we are warehousing the product and will be deploying the product to our clients’ designated locations subsequent to period-end. Additionally, we may perform services on a portion of the product prior to shipment to our clients and will be paid a fee for doing so. Although these product contracts are non-cancelable with customary credit terms beginning the date the inventories are segregated in our warehouse and invoiced to the client and the warranty periods begin on the date of invoice under previous accounting guidance, prior to Topic 606, these transactions did not meet the sales recognition criteria under GAAP. Therefore, we did not record sales and the inventories were classified as inventories not available for sale on our consolidated balance sheet until the product was delivered. If clients remitted payment before we delivered the product to them, then we recorded the payments received as deferred revenue on our consolidated balance sheet until such time as the product was delivered. For additional information about our accounting policy related to these transactions after adopting Topic 606, see the Bill and Hold Transactions Sales Recognition Property and Equipment We record property and equipment at cost. We capitalize major improvements and betterments, while maintenance, repairs and minor replacements are expensed as incurred. Depreciation or amortization is provided using the straight-line method over the following estimated economic lives of the assets: Estimated Economic Life Leasehold improvements Shorter of underlying lease term or asset life Furniture and fixtures 2 – 7 years Equipment 3 – 5 years Software 3 – 10 years Buildings 29 years Costs incurred to develop internal-use software during the application development stage, including capitalized interest, are recorded in property and equipment at cost. External direct costs of materials and services consumed in developing or obtaining internal-use computer software and payroll and payroll-related costs for teammates who are directly associated with and who devote time to internal-use computer software development projects, to the extent of the time spent directly on the project and specific to application development, are capitalized. Reviews are regularly performed to determine whether facts and circumstances exist which indicate that the economic life is shorter than originally estimated or the carrying amount of assets may not be recoverable. When an indication exists that the carrying amount of long-lived assets may not be recoverable, we assess the recoverability of our assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their remaining lives against their respective carrying amounts. Such impairment test is based on the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. Impairment, if any, is based on the excess of the carrying amount over the estimated fair value of those assets. Goodwill Goodwill is recorded when the purchase price paid for an acquisition exceeds the estimated fair value of net identified tangible and intangible assets acquired. Goodwill is tested for impairment at the reporting unit level on an annual basis in the fourth quarter and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying value. The Company has three reporting units, which are the same as our operating segments. Multiple valuation techniques would likely be used to assess the fair value of the reporting unit. These techniques include the use of estimates and assumptions that are inherently uncertain. Changes in these estimates and assumptions could materially affect the determination of fair value or goodwill impairment, or both. Intangible Assets We amortize finite lived intangible assets acquired in business combinations using the straight-line method over the estimated economic lives of the intangible assets from the date of acquisition. We regularly perform reviews to determine if facts and circumstances exist which indicate that the economic lives of our intangible assets are shorter than originally estimated or the carrying amount of these assets may not be recoverable. When an indication exists that the carrying amount of intangible assets may not be recoverable, we assess the recoverability of our assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their remaining lives against their respective carrying amounts. Such impairment test is based on the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. Impairment, if any, is based on the excess of the carrying amount over the estimated fair value of those assets. Self-Insurance We are self-insured in the United States for medical insurance up to certain annual stop-loss limits and workers’ compensation claims up to certain deductible limits. We establish reserves for claims, both reported and incurred but not reported, using currently available information as well as our historical claims experience. Treasury Stock We record repurchases of our common stock as treasury stock at cost. We also record the subsequent retirement of these treasury shares at cost. The excess of the cost of the shares retired over their par value is allocated between additional paid-in capital and retained earnings. The amount recorded as a reduction of paid-in capital is based on the excess of the average original issue price of the shares over par value. The remaining amount is recorded as a reduction of retained earnings. Sales Recognition We adopted ASU No. 2014-09, “Revenue from Contracts with Customers,” which created FASB Topic 606 (“Topic 606”) with a date of initial application of January 1, 2018. As a result, we changed our accounting policy for sales recognition as detailed below. Revenue is measured based on the consideration specified in a contract with a client, and excludes any sales incentives and amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control of a product or service to a client. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a client, are excluded from revenue. This is consistent with our accounting treatment prior to the adoption of Topic 606, whereby we We record the freight we bill to our clients as product net sales and the related freight costs we pay as product costs of goods sold. This is consistent with our accounting treatment prior to the adoption of Topic 606 . Nature of Goods and Services We sell hardware and software products on both a stand-alone basis without any services and as solutions bundled with services. When we provide a combination of hardware and software products with the provision of services, we separately identify our performance obligations under our contract with the client as the distinct goods (hardware and/or software products) or services that will be provided. The total transaction price for an arrangement with multiple performance obligations is allocated at contract inception to each distinct performance obligation in proportion to its stand-alone selling price. The stand-alone selling price is the price at which we would sell a promised good or service separately to a client. We estimate the price based on observable inputs, including direct labor hours and allocable costs, or use observable stand-alone prices when they are available. Product Offerings Hardware We recognize hardware product revenue at the point in time when a client takes control of the hardware, which typically occurs when title and risk of loss have passed to the client at its destination. Our selling terms and conditions were modified during the fourth quarter of 2017 to specify F.O.B. destination contractual terms such that control is transferred from the Company at the point in time when the product is received by the client. Prior to the adoption of Topic 606, because we either (i) had a general practice of covering client losses while products were in transit despite title and risk of loss contractually transferring at the point of shipment or (ii) had specifically stated F.O.B. destination contractual terms with the client, delivery was not deemed to have occurred until the point in time when the product was received by the client. The transaction price for hardware sales is adjusted for estimated product returns that we expect to occur under our return policy based upon historical return rates. We leverage drop-shipment arrangements with many of our partners and suppliers to deliver products to our clients without having to physically hold the inventory at our warehouses, thereby increasing efficiency and reducing costs. We recognize revenue for drop-shipment arrangements on a gross basis as the principal in the transaction when the product is received by the client because we control the product prior to transfer to the client. We also assume primary responsibility for fulfillment in the arrangement, we assume inventory risk if the product is returned by the client, we set the price of the product charged to the client and we work closely with our clients to determine their hardware specifications. This is consistent with our accounting treatment prior to the adoption of Topic 606. Bill and Hold Transactions We offer a service to our customers whereby clients may purchase product that we procure on their behalf and, at our clients’ direction, store the product in our warehouse for a designated period of time, with the intention of deploying the product to the clients’ designated locations at a later date. These warehousing services are designed to help our clients with inventory management challenges associated with technology roll-outs, product that is moving to end of life, and/or clients needing integrated stock available for immediate deployment. In some circumstances, we may also perform lab integration services on a portion of the product prior to shipment to our clients for a separate fee. The client is invoiced and title transfers to the client upon receipt of the product at our warehouse. These product contracts are non-cancelable with customary credit terms beginning the date the product is received in our warehouse and the warranty periods begin on the date of invoice. Revenue is recognized for the sale of the product to the client upon receipt of the product at our warehouse. The warehousing services and lab integration fees are considered separate performance obligations. Under previous accounting guidance, prior to the adoption of Topic 606, it was determined that these product sales transactions did not meet the revenue recognition criteria under GAAP. Therefore, we did not record product net sales, and the inventories were classified as inventories not available for sale on our consolidated balance sheets, until the product was delivered to the clients’ designated location. If clients remitted payment before we delivered the product to them, we recorded the payments received as deferred revenue on our consolidated balance sheets until such time as the product was delivered. Software We recognize revenue from software sales at the point in time when the client acquires the right to use or copy software under license and control transfers to the client. For renewals, revenue is recognized upon the commencement of the term of the software license agreement or when the renewal term begins, as applicable. This is a change from our accounting treatment prior to the adoption of Topic 606, whereby revenue from renewals of software licenses was recognized when the parties agreed to the renewal or extension, provided that all other revenue recognition criteria had been met. Although the revenue recognition treatment for term software license renewals has changed as described above, a substantial portion of the software licenses we sell are perpetual software licenses and do not require renewal or extension after their initial purchase by the client. Such perpetual licenses are periodically subject to true-up, whereby additional perpetual licenses are sold under the client’s pre-existing master agreement. Such true-ups are generally sold in arrears, and clients are invoiced for the additional licenses they had already been utilizing. Since the client controlled these additional perpetual licenses prior to the true-up, software revenue related to the underlying additional licenses is recognized when we agree to the true-up with our client and the partner. This is consistent with our accounting treatment prior to the adoption of Topic 606. For sales transactions for certain security software products that are sold with integral third-party delivered software maintenance, we changed our accounting to record the software license on a net basis, as the agent in the arrangement, given the predominant nature of the goods and services provided to the customer. This is a change from our accounting treatment prior to the adoption of Topic 606, whereby Services Offerings Software Maintenance Software maintenance agreements provide our clients with the right to obtain any software upgrades, bug fixes and help desk and other support services directly from the software publisher at no additional charge during the term of the software maintenance agreements. We act as the software publisher’s agent in selling these software maintenance agreements and do not assume any performance obligation to the client under the agreements. As a result, we are the agent in these transactions and these sales are recorded on a net sales recognition basis. Under net sales recognition, the cost of the software maintenance agreement is recorded as a reduction to sales, resulting in net sales equal to the gross profit on the transaction, and there are no costs of goods sold. Because we are acting as the software publisher’s agent, revenue is recognized when the parties agree to the initial purchase, renewal or extension as our agency services are then complete. Cloud / Software-as-a-Service Offerings Cloud or software-as-a-service subscription products provide our clients with access to software products hosted in the public cloud without the client taking possession of the software. We act as the software publisher’s agent in selling these software-as-a service subscription products and do not host the software products on our servers. We do not take control of the software products or assume any performance obligations to the clients related to the provisioning of the offerings in the cloud. As a result, these sales are recorded on a net sales recognition basis. This is consistent with our accounting treatment prior to the adoption of Topic 606. We report all fees earned from activities reported net within our services net sales category in our consolidated statements of operations. Insight Delivered Services We design, procure, deploy, implement and manage solutions that combine hardware, software and services to help businesses run smarter. Such services are provided by us or third-party sub-contract vendors as part of bundled arrangements, or are provided separately on a stand-alone basis as technical, consulting or managed services engagements. If the services are provided as part of a bundled arrangement with hardware and software, the hardware, software and services are generally distinct performance obligations. In general, we recognize revenue from services engagements as we perform the underlying services and satisfy our performance obligations. We recognize revenue from sales of services by measuring progress toward complete satisfaction of the related service performance obligation. Billings for such services that are made in advance of the related revenue recognized are recorded as a contract liability. Specific revenue recognition practices for certain of our services offerings are described in further detail below. Time and Materials Services Contracts We recognize revenue for professional services engagements that are on a time and materials basis based upon hours incurred for the performance completed to date for which we have the right to consideration, even if such amounts have not yet been invoiced as of period end. This is consistent with our accounting treatment prior to the adoption of Topic 606. Fixed Fee Services Contracts We recognize revenue on fixed fee professional services contracts using a proportional performance method of revenue recognition based on the ratio of direct labor and other allocated costs incurred to total estimated direct labor and other allocated costs. This is consistent with our accounting treatment prior to the adoption of Topic 606. OneCall Support Services Contracts When we sell certain hardware and/or software products to our clients, we also enter into service contracts with them. These contracts are support service agreements for the hardware and/or software products that were purchased from us. Under certain support services contracts, although we purchase third-party support contracts for maintenance on the specific hardware or software products we have sold, our internal support desk assists the client first by performing an initial technical triage to determine the source of the problem and whether we can direct the client on how to fix the problem. We refer to these services as “OneCall.” We act as the principal in the transaction because we perform the OneCall services over the term of the support service contract and we set the price of the service charged to the client As a result, we recognize revenue . This On our consolidated balance sheet, a significant portion of our contract liabilities balance relates to OneCall support services agreements for which clients have paid or have been invoiced but for which we have not yet recognized the applicable services revenue. We also defer incremental direct costs to fulfill our service contracts that we prepay to third parties for direct support of our fulfillment of the service contract to our clients under our contract terms and amortize them into operations over the term of the contracts. Vendor Direct Support Services Contracts When we do not provide OneCall services to the client on hardware and/or software products that were purchased, the client may purchase a vendor direct support services contract through us. Under these contracts, our clients call the manufacturer/publisher or its designated service organization directly for both the initial technical triage and any follow-up assistance. We act as the manufacturer/publisher’s agent in selling these support service contracts and do not assume any performance obligation to the client under the arrangements. As a result, these sales are recorded on a net sales recognition basis similar to software maintenance agreements, as discussed above. Because we are acting as the manufacturer/publisher’s agent, revenue is recognized when the parties agree to the purchase of the support services contract as our agency services are then complete. This is consistent with our accounting treatment prior to the adoption of Topic 606. Third-party Provided Services A majority of our third-party sub-contractor services contracts are entered into in conjunction with other services contracts under which the services are performed by Insight teammates. We have concluded that we control all services under the contract and can direct the third-party sub-contractor to provide the requested services. As such, we act as the principal in the transaction and record the services under a gross sales recognition basis, with the selling price being recorded in sales and our cost to the third-party service provider being recorded in costs of goods sold. For certain third-party service contracts in which we are not responsible for fulfillment of the services, we have concluded that we are an agent in the transaction and record revenue on a net sales recognition basis. This is consistent with our accounting treatment prior to the adoption of Topic 606. Costs of Goods Sold Costs of goods sold include product costs, direct costs incurred associated with delivering services, outbound and inbound freight costs and provisions for inventory reserves. These costs are reduced by provisions for supplier discounts and certain payments and credits received from partners, as described under “Partner Funding” below. Selling and Administrative Expenses Selling and administrative expenses include salaries and wages for teammates who are not directly associated with delivering services, bonuses and incentives, stock-based compensation expense, employee-related expenses, facility-related expenses, marketing and advertising expense, reduced by certain payments and credits received from partners related to shared marketing expense programs, as described under “Partner Funding” below, depreciation of property and equipment, professional fees, amortization of intangible assets, provisions for losses on accounts receivable and other operating expenses. Partner Funding We receive payments and credits from partners, including consideration pursuant to volume sales incentive programs, volume purchase incentive programs and shared marketing expense programs. Partner funding received pursuant to volume sales incentive programs is recognized as it is earned as a reduction to costs of goods sold. Partner funding received pursuant to volume purchase incentive programs is allocated as a reduction to inventories based on the applicable incentives earned from each partner and is recorded in cost of goods sold as the related inventory is sold. Partner funding received pursuant to shared marketing expense programs is recorded as it is earned as a reduction of the related selling and administrative expenses in the period the program takes place if the consideration represents a reimbursement of specific, incremental, identifiable costs. Consideration that exceeds the specific, incremental, identifiable costs is classified as a reduction of costs of goods sold. The amount of partner funding recorded as a reduction of selling and administrative expenses in our statements of operations totaled $68,571,000, $53,227,000 and $48,114,000 in 2018, 2017 and 2016, respectively. Concentrations of Risk Credit Risk Although we are affected by the international economic climate, management does not believe material credit risk concentration existed at December 31, 2018. We monitor our clients’ financial condition and do not require collateral. No single client accounted for more than 4% of our consolidated net sales in 2018. Supplier Risk Purchases from Microsoft accounted for approximately 26% of our aggregate purchases in 2018. No other partner accounted for more than 10% of purchases in 2018. Our top five partners as a group for 2018 were Microsoft, Cisco Systems, Tech Data (a distributor), HP Inc. and Ingram Micro (a distributor), and approximately 60% of our total purchases during 2018 came from this group of partners. Although brand names and individual products are important to our business, we believe that competitive sources of supply are available in substantially all of our product categories such that, with the exception of Microsoft, we are not dependent on any single partner for sourcing products. Advertising Costs Advertising costs are expensed as they are incurred. Advertising expense of $ 57,448 Stock-Based Compensation Stock-based compensation is measured based on the fair value of the award on the date of grant and the corresponding expense is recognized over the period during which an employee is required to provide service in exchange for the reward. Stock-based compensation expense is classified in the same line item of our consolidated statements of operations as other payroll-related expenses specific to the employee. Compensation expense related to service-based restricted stock units (“RSUs”) is recognized on a straight-line basis over the requisite service period for the entire award. Compensation expense related to performance-based RSUs is recognized on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in-substance, multiple awards (i.e., a graded vesting basis). Forfeitures are recognized as they occur. Foreign Currencies We use the U.S. dollar as our reporting currency. The functional currencies of our foreign subsidiaries are the local currencies. Accordingly, assets and liabilities of the subsidiaries are translated into U.S. dollars at the exchange rate in effect at the balance sheet dates. Income and expense items are translated at the average exchange rate for each month within the year. The resulting translation adjustments are recorded directly in accumulated other comprehensive income, net of tax – foreign currency trans

New Accounting Standard - Sales

New Accounting Standard - Sales Recognition	12 Months Ended
	Dec. 31, 2018
Accounting Changes And Error Corrections [Abstract]
New Accounting Standard - Sales Recognition	( 2 ) New Accounting Standard – Sales Recognition We adopted ASU No. 2014-09, “Revenue from Contracts with Customers,” which created FASB Topic 606 (“Topic 606”) with a date of initial application of January 1, 2018. Topic 606 also includes Subtopic 340-40, “Other Assets and Deferred Costs – Contracts with Customers,” which requires the deferral of incremental costs of obtaining a contract with a customer. As a result, we changed our accounting policy for sales recognition and incremental costs of obtaining a contract with a customer as detailed below. We applied Topic 606 using the modified retrospective transition method. In adopting the new standard, the net cumulative effect from prior periods of applying the guidance in Topic 606 was recognized as a cumulative effect adjustment to the opening balance of retained earnings in our consolidated balance sheet as of January 1, 2018. Additionally, we have elected the option to only account for contracts that remained open as of the January 1, 2018 transition date in accordance with Topic 606. Revenue recognition for contracts for which substantially all of the revenue was recognized in accordance with the revenue guidance in effect before January 1, 2018 has not been changed. The comparative information as of December 31, 2017 and for the years ended December 31, 2017 and 2016 have not been adjusted and continue to be reported under the previously applicable accounting standards. The details of the significant changes and quantitative impact of the changes are set forth below. • For sales transactions for certain security software products that are sold with integral third-party delivered software maintenance, we changed our accounting to record both the software license and the accompanying software maintenance on a net basis, as the agent in the arrangement, given the predominant nature of the goods and services provided to the customer. Under previous guidance, we bifurcated the sale of the software license from the sale of the maintenance contract, recorded the sale of the software product on a gross sales recognition basis and recorded the sale of the software maintenance on a net sales recognition basis. This change has no effect on reported gross profit dollars associated with these transactions. • The accounting for inventories not available for sale, otherwise known as bill and hold arrangements, changed such that a portion of revenue under the contracts is recognized earlier than we were recognizing under previous accounting standards. Bill and hold arrangements are inventory balances owned by our clients that we are warehousing and will be deploying to the clients’ locations in a future period. • The accounting for renewals of certain software term/usage licenses changed to delay or accelerate revenue recognition to the renewal period. Under previous guidance, we recognized revenue as the renewal order was completed. • The accounting for certain contracts with our clients that include payment terms that exceed one year changed such that we recognize revenue at the point in time when control of the product is transferred to the client or over the period of time that the service is provided to the client. To the extent that a significant financing component exists in these arrangements, we will record interest income associated with the financing component of the arrangement over the payment terms of the arrangement. Under previous guidance, we deferred revenue recognition under these contracts until payments became due as a result of the extended payment terms. • The timing of revenue recognition for certain services contracts also changed to align with an appropriate input or output method. For example, the timing of revenue recognition for certain services contracts with stated milestone terms changed to an earlier point in time when control transfers to the customer. Under previous guidance, we recognized revenue based on the milestones stated in the contract with our customer. • The accounting for recording sales returns allowance changed from being recorded against accounts receivable to being recorded as a refund liability. As a result, in our consolidated balance sheets, we reclassified our sales returns allowance balance from accounts receivable, net to accrued expenses and other current liabilities. Under previous guidance, we recorded the sales returns allowance in accounts receivable, net and not as a separately stated liability. • The accounting for sales commissions on contracts with performance periods that exceed one year changed such that we record such sales commissions as an asset and amortize them to expense over the related contract performance period. Under previous guidance, sales commissions were expensed in the period the transaction was generated. The total cumulative effect adjustment from prior periods that we recognized in our consolidated balance sheet as of January 1, 2018 as an adjustment to retained earnings was $7,176,000. The following tables summarize the effects of adopting Topic 606 on the Company’s consolidated financial statements as of December 31, 2018 (in thousands, except for per share data): BALANCE SHEET AT DECEMBER 31, 2018 Pre-Topic 606 As Reported Adjustments Adoption Cash and cash equivalents $ 142,655 $ — $ 142,655 Accounts receivable, net 1,931,736 (145,184 ) 1,786,552 Inventories 148,503 — 148,503 Inventories not available for sale — 118,936 118,936 Other current assets 115,683 39,684 155,367 Total current assets 2,338,577 13,436 2,352,013 Property and equipment, net 72,954 — 72,954 Goodwill 166,841 — 166,841 Intangible assets, net 112,179 — 112,179 Deferred income taxes 7,967 — 7,967 Other assets 77,429 (13,762 ) 63,667 $ 2,775,947 $ (326 ) $ 2,775,621 Accounts payable – trade $ 978,104 $ (84,504 ) $ 893,600 Accounts payable – inventory financing facility 304,130 — 304,130 Accrued expenses and other current liabilities 190,733 (16,557 ) 174,176 Current portion of long-term debt 1,395 — 1,395 Deferred revenue 62,300 121,526 183,826 Total current liabilities 1,536,662 20,465 1,557,127 Long-term debt 195,525 — 195,525 Deferred income taxes 683 — 683 Other liabilities 56,088 (11,443 ) 44,645 1,788,958 9,022 1,797,980 Stockholders’ equity: Preferred stock — — — Common stock 355 — 355 Additional paid-in capital 323,622 — 323,622 Retained earnings 704,665 (9,311 ) 695,354 Accumulated other comprehensive loss – foreign currency translation adjustments (41,653 ) (37 ) (41,690 ) Total stockholders’ equity 986,989 (9,348 ) 977,641 $ 2,775,947 $ (326 ) $ 2,775,621 STATEMENT OF OPERATIONS FOR TH E YEAR ENDED DECEMBER 31, 2018 Pre-Topic 606 As Reported Adjustments Adoption Net sales: Products $ 6,249,938 $ 49,497 $ 6,299,435 Services 830,198 (11,675 ) 818,523 Total net sales 7,080,136 37,822 7,117,958 Costs of goods sold: Products 5,711,400 39,616 5,751,016 Services 375,018 479 375,497 Total costs of goods sold 6,086,418 40,095 6,126,513 Gross profit 993,718 (2,273 ) 991,445 Operating expenses: Selling and administrative expenses 756,529 373 756,902 Severance and restructuring expenses 3,424 — 3,424 Acquisition-related expenses 282 — 282 Earnings from operations 233,483 (2,646 ) 230,837 Non-operating expense, net 21,581 8 21,589 Earnings before income taxes 211,902 (2,654 ) 209,248 Income tax expense 48,225 (519 ) 47,706 Net earnings $ 163,677 $ (2,135 ) $ 161,542 Net earnings per share: Basic $ 4.60 $ (0.06 ) $ 4.54 Diluted $ 4.55 $ (0.06 ) $ 4.49 Shares used in per share calculations: Basic 35,586 — 35,586 Diluted 36,009 — 36,009 STATEMENT OF CASH FLOWS FOR THE YEAR ENDED DECEMBER 31, 2018 The adoption of Topic 606 had no effect on net cash provided by operating activities, net cash used in investing activities or net cash used in financing activities for the year ended December 31, 2018. The adjustment to net earnings noted above in reconciling our reported results of operations for the year ended December 31, 2018 under Topic 606 to pre-Topic 606 adoption was fully offset by adjustments to the reported changes in asset and liability balances, resulting in no effect on operating cash flows. Disaggregation of Revenue In the following table, revenue is disaggregated by our reportable operating segments, which are primarily defined by Year Ended December 31, 2018 North America EMEA APAC Consolidated Major Offerings Hardware $ 3,610,356 $ 653,499 $ 29,496 $ 4,293,351 Software 1,112,715 736,509 107,363 1,956,587 Services 639,910 140,233 50,055 830,198 $ 5,362,981 $ 1,530,241 $ 186,914 $ 7,080,136 Major Client Groups Large Enterprise / Corporate $ 3,951,900 $ 1,134,696 $ 49,826 $ 5,136,422 Public Sector 498,873 327,818 76,567 903,258 Small and Medium-Sized Businesses 912,208 67,727 60,521 1,040,456 $ 5,362,981 $ 1,530,241 $ 186,914 $ 7,080,136 Revenue Recognition based on acting as Principal or Agent in the Transaction Gross revenue recognition (Principal) $ 5,143,228 $ 1,439,979 $ 164,394 $ 6,747,601 Net revenue recognition (Agent) 219,753 90,262 22,520 332,535 $ 5,362,981 $ 1,530,241 $ 186,914 $ 7,080,136 Contract Balances The following table provides information about receivables, contract assets and contract liabilities as of December 31, 2018 and January 1, 2018 (in thousands): December 31, January 1, 2018 2018 Current receivables, which are included in “Accounts receivable, net” $ 1,931,736 $ 1,909,074 Non-current receivables, which are included in “Other assets” 38,157 32,227 Contract assets, which are included in “Other current assets” 892 595 Contract liabilities, which are included in “Deferred revenue” and “Other liabilities” 82,117 86,743 Significant changes in the contract assets and the contract liabilities balances during the year ended December 31, 2018 are as follows (in thousands): Increase (Decrease) Contract Contract Assets Liabilities Balances at January 1, 2018 $ 595 $ 86,743 Reclassification of the beginning contract liabilities to revenue, as the result of performance obligations satisfied — (72,779 ) Cash received in advance and not recognized as revenue — 68,153 Reclassification of the beginning contract assets to receivables, as the result of rights to consideration becoming unconditional (595 ) — Contract assets recognized, net of reclassification to receivables 892 — Balances at December 31, 2018 $ 892 $ 82,117 Transaction price allocated to the remaining performance obligations The following table includes estimated net sales related to performance obligations that are unsatisfied (or partially unsatisfied) as of December 31, 2018 that are expected to be recognized in the future (in thousands): Products Services Total 2019 13 88,998 89,011 2020 5 28,906 28,911 2021 — 11,251 11,251 2022 — 4,413 4,413 2023 — 1,841 1,841 2024 and thereafter — 376 376 Total remaining performance obligations $ 18 $ 135,785 $ 135,803 Topic 606 allows for certain practical expedients which we have elected to apply. As a result, with the exception of remaining performance obligations associated with our OneCall Support Services contracts which are included in the table above regardless of original duration, we do not disclose information about remaining performance obligations that have original expected durations of one year or less in the table above. Amounts not included in the table above have an average original expected duration of eight months. Additionally, for our time and material services contracts, whereby we have the right to consideration from a client in an amount that corresponds directly with the value to the client of our performance completed to date, we recognized revenue in the amount to which we have a right to invoice as of December 31, 2018 and do not disclose information about related remaining performance obligations in the table above. Our time and material contracts have an average expected duration of 12 months. The majority of our backlog historically has been and continues to be open cancelable purchase orders. We do not believe that backlog as of any particular date is predictive of future results, therefore we do not include performance obligations under open cancelable purchase orders, which do not qualify for revenue recognition in accordance with Topic 606 as of December 31, 2018, in the table above. Assets recognized for costs of obtaining a contract with a customer We believe that the only significant incremental costs incurred to obtain contracts with our clients within the scope of Topic 606 are sales commissions. The majority of our contracts are completed within a one-year performance period, and for contracts with a specified term of one year or less, we have exercised a practical expedient, which allows us to recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that we otherwise would have recognized is one year or less. Under Topic 606, we record sales commissions on contracts with performance periods that exceed one year as an asset and amortize the asset to expense over the related contract performance period. As of December 31, 2018, the related asset balance was $2,763,000, which we expect to recognize as expense over the next 36 months. Under previous accounting standards, we recognized sales commissions as earned and recorded such amounts within selling and administrative expenses in our statements of operations.

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Property and Equipment	(3) Property and Equipment Property and equipment consist of the following (in thousands): December 31, 2018 2017 Software $ 170,327 $ 171,701 Buildings 64,263 65,468 Equipment 100,421 103,542 Furniture and fixtures 38,200 38,459 Leasehold improvements 26,319 25,981 Land 5,124 5,179 404,654 410,330 Accumulated depreciation and amortization (331,700 ) (335,078 ) Property and equipment, net $ 72,954 $ 75,252 We periodically assess whether any indicators of impairment existed related to our property and equipment. We incurred non-cash charges of $393,000 and $418,000 during 2018 and 2017, respectively, to write-off certain property and equipment. No such charges were incurred in 2016. Depreciation and amortization expense related to property and equipment was $21,721,000, $25,787,000 and $27,493,000 in 2018, 2017 and 2016, respectively. Interest charges capitalized in connection with internal-use software development projects in 2018, 2017 and 2016 were immaterial.

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	( 4 ) Goodwill The changes in the carrying amount of goodwill for the year ended December 31, 2018 are as follows (in thousands): North America EMEA APAC Consolidated Goodwill $ 379,110 $ 151,439 $ 20,930 $ 551,479 Accumulated impairment losses $ (323,422 ) $ (151,439 ) $ (13,973 ) $ (488,834 ) Goodwill acquired during 2017 64,140 4,041 605 68,786 Balance at December 31, 2017 119,828 4,041 7,562 131,431 Goodwill acquired during 2018 36,440 (108 ) — 36,332 Foreign currency translation adjustment — (184 ) (738 ) (922 ) Balance at December 31, 2018 $ 156,268 $ 3,749 $ 6,824 $ 166,841 On August 1, 2018, we acquired Cardinal, which has been integrated into our North America business. Under the acquisition method of accounting, the purchase price for the acquisition was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The excess purchase price over fair value of net assets acquired of approximately $36,440,000 was recorded as goodwill in the North America reporting unit (see Note 20). The primary driver for this acquisition was to strengthen our services capabilities and bring value to our clients within our digital innovation services solution offering. On September 26, 2017, we acquired Caase.com, which has been integrated into our EMEA business. Under the acquisition method of accounting, the purchase price for the acquisition was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The excess purchase price over fair value of net assets acquired of approximately $4,041,000 was recorded as goodwill in the EMEA reporting unit (see Note 20). The primary driver for this acquisition was to strengthen our ability to deliver cloud and data center solutions to our clients in the Netherlands, with a view to expand into the wider European region in the near future. The change in goodwill in our EMEA operating segment as of December 31, 2018 compared to the balance as of December 31, 2017 resulted from a final balancing adjustment during the year and foreign currency translation adjustments associated with the goodwill balance. On January 6, 2017, we acquired Datalink, which has been integrated into our North America business. Under the acquisition method of accounting, the purchase price for the acquisition was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The excess purchase price over fair value of net assets acquired of approximately $64,140,000 was recorded as goodwill in the North America reporting unit (see Note 20). The primary driver for this acquisition was to strengthen our position as a leading IT solutions provider with deep technical talent delivering data center solutions to clients on premise or in the cloud. On September 1, 2016, we acquired Ignia, which has been integrated into our APAC business. Under the acquisition method of accounting, the purchase price for the acquisition was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The excess purchase price over fair value of net assets acquired of approximately $6,957,000 was recorded as goodwill in the APAC reporting unit (see Note 20). The During 2018, we periodically assessed whether any indicators of impairment existed which would require us to perform an interim impairment review. As of each interim period end during the year, we concluded that a triggering event had not occurred that would more likely than not reduce the fair value of our reporting units below their carrying values. We performed our annual test of goodwill for impairment during the fourth quarter of 2018. The results of the goodwill impairment test indicated that the fair values of our North America, EMEA and APAC reporting units, estimated using the market approach, were in excess of their respective carrying values.

Intangible Assets

Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets	( 5 ) Intangible Assets Intangible assets consist of the following (in thousands): December 31, 2018 2017 Customer relationships $ 159,566 $ 133,660 Other 5,555 4,475 165,121 138,135 Accumulated amortization (52,942 ) (37,357 ) Intangible assets, net $ 112,179 $ 100,778 In March and December 2017, respectively, the customer relationship intangible assets associated with the 2012 acquisition of Inmac and the 2011 acquisition of Ensynch were fully amortized. As such, the gross intangible assets balance and the accumulated amortization balance were both reduced by approximately $2,516,000, which had no effect on the net intangible assets balance reported in the accompanying consolidated balance sheet as of December 31, 2017. During 2018, we periodically assessed whether any indicators of impairment existed related to our intangible assets. As of each interim period end during the year, we concluded that a triggering event had not occurred that would more likely than not reduce the fair value of our intangible assets below their carrying values. Amortization expense recognized in 2018, 2017 and 2016 was $15,737,000, $16,812,000 and $10,637,000, respectively. Future amortization expense for the remaining unamortized balance as of December 31, 2018 is estimated as follows (in thousands): Years Ending December 31, Amortization Expense 2019 $ 14,602 2020 14,590 2021 14,429 2022 14,256 2023 13,831 Thereafter 40,471 Total amortization expense $ 112,179

Accounts Payable - Inventory Fi

Accounts Payable - Inventory Financing Facility	12 Months Ended
	Dec. 31, 2018
Payables And Accruals [Abstract]
Accounts Payable - Inventory Financing Facility	( 6 ) Accounts Payable - Inventory Financing Facility We have entered into an agreement with a financial intermediary to facilitate the purchase of inventory from various suppliers under certain terms and conditions, as described below. These amounts are classified separately as accounts payable - inventory financing facility in the accompanying consolidated balance sheets. Our inventory financing facility was amended on March 23, 2018 to increase the aggregate availability for vendor purchases under the facility from $325,000,000 to $400,000,000, of which $304,130,000 was outstanding at December 31, 2018. In conjunction with the increase, we no longer have the option to request additional increases in the aggregate amount available under the inventory financing facility without amending the facility. The facility matures on June 23, 2021. Additionally, the facility may be renewed under certain circumstances described in the agreement for successive 12-month periods. Interest does not accrue on accounts payable under this facility provided the accounts payable are paid within stated vendor terms (typically 60 days); however, we impute interest on the average daily balance outstanding during these stated vendor terms based on our blended incremental borrowing rate during the period under our senior revolving credit facility and our accounts receivable securitization financing facility. Imputed interest of $10,593,000

Debt, Capital Lease and Other F

Debt, Capital Lease and Other Financing Obligations	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt, Capital Lease and Other Financing Obligations	( 7 ) Debt, Capital Lease and Other Financing Obligations Debt Our long-term debt consists of the following (in thousands): December 31, 2018 2017 Senior revolving credit facility $ — $ 117,500 Term Loan A (less unamortized debt issuance costs of $873 in 2017) — 165,377 Accounts receivable securitization financing facility 194,000 25,000 Capital leases and other financing obligations 2,920 5,291 Total 196,920 313,168 Less: current portion of long-term debt (1,395 ) (16,592 ) Long-term debt $ 195,525 $ 296,576 Our senior revolving credit facility (“revolving facility”) is used for general corporate purposes, which may include acquisitions and share repurchases, and may be used for borrowings in certain foreign currencies and for letters of credit, in each case up to specified sublimits. The revolving facility has an aggregate U.S. dollar equivalent maximum borrowing amount of $350,000,000, including a maximum borrowing capacity that may be used for borrowing in certain foreign currencies of $50,000,000. On January 6, 2017, in connection with the acquisition of Datalink, we amended our revolving facility to expand the facility by $175,000,000 in the form of an incremental Term Loan A (“TLA”). On December 7, 2018, we paid off the remaining balance of the TLA. The revolving facility is guaranteed by the Company’s material domestic subsidiaries and are secured by a lien on substantially all of the Company’s and each guarantor’s assets. The interest rates applicable to borrowings under the revolving facility and the TLA are based on the leverage ratio of the Company as set forth on a pricing grid in the agreement. Amounts outstanding under the revolving facility and TLA bear interest, payable quarterly, at a floating rate equal to the prime rate plus a predetermined spread of 0.00% to 0.75% or, at our option, a LIBOR rate plus a pre-determined spread of 1.25% to 2.25%. The floating interest rate applicable at December 31, 2018 was 3.66% per annum for the revolving facility. In addition, we pay a quarterly commitment fee on the unused portion of the facility of 0.25% to 0.45%, and our letter of credit participation fee ranges from 1.25% to 2.25%. During 2018, 2017 and 2016, due to availability under our accounts receivable securitization financing facility (“ABS facility”), weighted average borrowings under our revolving facility were $16,684,000, $63,604,000 and $35,811,000, respectively. Interest expense associated with the revolving facility and TLA was $8,198,000, $8,491,000 and $2,191,000 in 2018, 2017 and 2016, respectively, including the commitment fee and amortization of deferred financing fees. As of December 31, 2018, $350,000,000 was available under our revolving facility. See discussion of the maximum leverage ratio under “Debt Covenants” below. The revolving facility matures on June 23, 2021. Our ABS facility was amended on June 27, 2018 to, among other things, renew the borrowing program for a three-year term expiring June 23, 2021. The ABS facility has a maximum aggregate borrowing availability of $250,000,000. Under our ABS facility, we can sell receivables periodically to a special purpose accounts receivable and financing entity (the “SPE”), which is exclusively engaged in purchasing receivables from us. The SPE is a wholly-owned, bankruptcy-remote entity that we have included in our consolidated financial statements. The SPE funds its purchases by selling undivided interests in eligible trade accounts receivable to independent financial institution purchasers under the ABS facility (“Purchasers”), which is administered by an independent financial institution agent. The SPE’s assets are available first and foremost to satisfy the claims of the Purchasers, and we cannot convey any interest in the receivables sold to the Purchasers (or allow any adverse claims on the receivables) without the consent of the Purchasers. In addition, the SPE is required to maintain a minimum capital amount and various reserves pursuant to the terms of the ABS facility. We maintain effective control over the receivables that are sold. Accordingly, the receivables remain recorded on our consolidated balance sheets. At December 31, 2018 and 2017, the SPE owned $1,101,597,000 and $1,141,520,000, respectively, of receivables recorded at fair value and included in the accompanying consolidated balance sheets. While the ABS facility has a stated maximum amount, the actual availability under the ABS facility is limited by the quantity and quality of the underlying accounts receivable. As of December 31, 2018, qualified receivables were sufficient to permit access to the full $250,000,000 facility amount, of which $194,000,000 was outstanding. See discussion of the maximum leverage ratio under “Debt Covenants” below. Under the amended ABS facility, interest is payable monthly, and the floating interest rate applicable at December 31, 2018 was 3.46% per annum, including a 0.85% usage fee on any outstanding balances. In addition, we pay a monthly commitment fee on the unused portion of the facility of 0.375%. During the years ended December 31, 2018, 2017 and 2016, the weighted average interest rates on amounts outstanding under our ABS facility, including the usage and commitment fees and the amortization of deferred financing fees, were 3.6%, 2.4% and 1.9%, respectively. Weighted average borrowings under our ABS facility in 2018, 2017 and 2016 were $98,663,000, $153,759,000 and $145,376,000, respectively. Debt Covenants Our revolving facility and our ABS facility contain various covenants customary for transactions of this type, including limitations on the payment of dividends and the requirement that we comply with maximum leverage and minimum fixed charge ratio requirements, comply with a minimum receivables requirement and meet monthly, quarterly and annual reporting requirements. If we fail to comply with these covenants, the lenders would be able to demand payment within a specified period of time. Further, the terms of the ABS facility identify various circumstances that would result in an “amortization event” under the facility. Our consolidated debt balance that can be outstanding at the end of any fiscal quarter under our revolving facility and our ABS facility is limited by certain financial covenants, particularly a maximum leverage ratio. The maximum leverage ratio is calculated as aggregate debt outstanding divided by the sum of our trailing twelve month net earnings (loss) plus (i) interest expense, excluding non-cash imputed interest on our inventory financing facility, (ii) income tax expense (benefit), (iii) depreciation and amortization, (iv) non-cash stock-based compensation, (v) extraordinary or non-recurring non-cash losses or expenses and (vi) certain cash restructuring and acquisition-related charges and synergies, not to exceed a specified cap (“adjusted earnings”). The maximum leverage ratio permitted under the facilities is currently 3.25 times our trailing twelve-month adjusted earnings. A significant drop in our adjusted earnings would limit the amount of indebtedness that could be outstanding at the end of any fiscal quarter to a level that would be below our consolidated maximum facility amount. Based on our maximum leverage ratio as of December 31, 2018, our aggregate debt balance that could have been outstanding under our revolving facility and our ABS facility was the full amount of the maximum borrowing capacity of $600,000,000, of which Capital Lease and Other Financing Obligations In 2016 and 2017, we entered into capital leases with 36 to 40 month terms for certain IT equipment. In October 2018, these capital leases were modified and the lease terms were extended to between 30 and 33 month terms. The original capital leases and subsequent modifications were non-cash transactions and, accordingly, $977,000 has been excluded from our consolidated statements of cash flows for the years ended December 31, 2018 and 2017. Future minimum payments under the capitalized leases consist of the following as of December 31, 2018 (in thousands): Years Ending December 31, 2019 $ 1,488 2020 1,151 2021 432 Total minimum lease payments 3,071 Less amount representing interest (151 ) Present value of minimum lease payments $ 2,920 From time to time, we also enter into other financing agreements with financial intermediaries to facilitate the purchase of products from certain vendors. In conjunction with our acquisition of Datalink effective January 6, 2017, we acquired certain obligations associated with Datalink’s financing of the equipment that it leased to its clients. As of December 31, 2018 there were no The current and long-term portions of our capital lease and other financing obligations are included in the current and long-term portions of long-term debt in the table above and in our consolidated balance sheets as of December 31, 2018 and 2017.

Operating Leases

Operating Leases	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Operating Leases	( 8 ) Operating Leases We have non-cancelable operating leases with third parties, primarily for administrative and distribution center space and computer equipment. Our facilities leases generally provide for periodic rent increases and many contain escalation clauses and renewal options. We recognize rent expense on a straight-line basis over the lease term. Future minimum lease payments under non-cancelable operating leases (with initial or remaining lease terms in excess of one year) as of December 31, 2018 are as follows (in thousands): Years Ending December 31, 2019 $ 21,499 2020 15,580 2021 12,121 2022 9,150 2023 6,296 Thereafter 7,238 Total minimum lease payments $ 71,884 Amounts in the table above exclude approximately $1.6 million in 2019

Severance and Restructuring Act

Severance and Restructuring Activities	12 Months Ended
	Dec. 31, 2018
Restructuring And Related Activities [Abstract]
Severance and Restructuring Activities	( 9 ) Severance and Restructuring Activities During 2018, 2017 and 2016, we recorded severance expense associated with the elimination of certain positions based on a re-alignment of roles and responsibilities and a continued review of resource needs. Charges in North America included severance actions taken to realign roles and responsibilities subsequent to the acquisition of Datalink in January 2017, as well as a headcount reduction as part of cost reduction initiatives in the fourth quarter of 2018 and 2017, and early in 2016. Charges in EMEA included ongoing restructuring activities, primarily in France, Germany, the United Kingdom and the Netherlands, as part our cost reduction and restructuring initiatives in the region. The APAC charges primarily related to severance actions taken subsequent to the acquisition of Ignia. The following table details the activity for each of the three years in the period ending December 31, 2018 related to these resource actions, and the outstanding obligations as of December 31, 2018 (in thousands): North America EMEA APAC Consolidated Balances at December 31, 2015 505 2,983 — 3,488 Severance costs, net of adjustments 2,966 1,496 118 4,580 Cash payments (2,524 ) (3,239 ) (118 ) (5,881 ) Foreign currency translation adjustments — (23 ) — (23 ) Balances at December 31, 2016 947 1,217 — 2,164 Severance costs, net of adjustments 4,010 4,888 104 9,002 Cash payments (3,336 ) (3,597 ) (89 ) (7,022 ) Foreign currency translation adjustments 10 486 — 496 Balances at December 31, 2017 1,631 2,994 15 4,640 Severance costs, net of adjustments 1,617 1,677 130 3,424 Cash payments (2,003 ) (3,386 ) (145 ) (5,534 ) Foreign currency translation adjustments (41 ) (37 ) — (78 ) Balances at December 31, 2018 $ 1,204 $ 1,248 $ — $ 2,452 Immaterial adjustments were recorded as a reduction to severance and restructuring expense in each of 2018, 2017 and 2016, due to changes in estimates. The remaining outstanding obligations as of December 31, 2018 are expected to be paid during the next 12 months and are therefore included in accrued expenses and other current liabilities.

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	( 10 ) Stock-Based Compensation We recorded the following pre-tax amounts in selling and administrative expenses for stock-based compensation, by operating segment, in the accompanying consolidated financial statements (in thousands): Years Ended December 31, 2018 2017 2016 North America $ 11,697 $ 9,697 $ 8,096 EMEA 3,170 2,737 2,530 APAC 488 392 432 Total Consolidated $ 15,355 $ 12,826 $ 11,058 Company Plan Our Board of Directors adopted the Amended Insight Enterprises, Inc. 2007 Omnibus Plan (the “Plan”) on March 28, 2011. The Plan was approved by our stockholders on May 18, 2011 at our 2011 annual meeting and, unless sooner terminated, will remain in place until May 18, 2021. The Plan allows the Company to grant options, stock appreciation rights, stock awards, restricted stock, stock units (which may also be referred to as “restricted stock units”), performance shares, performance units, cash-based awards and other awards payable in cash or shares of common stock to eligible non-employee directors, employees and consultants. Consultants and independent contractors are eligible if they provide bona fide services that are not related to capital raising or promoting or maintaining a market for the Company’s stock. On February 17, 2016, the Board of Directors adopted the First Amendment to the Plan (the “First Amendment”). On May 18, 2016 at our 2016 annual meeting, our stockholders approved the First Amendment. The First Amendment: (a) updates the list of performance criteria contained in Section 16.1 of the Plan; (b) imposes a limit on the dollar value of awards that may be granted to any one participant who is a non-employee director during any one calendar year; and (c) adds an objective clawback provision expressly providing that every award granted under the Plan is subject to potential forfeiture or recovery to the fullest extent called for by law, listing standard or Company policy. The First Amendment did not increase the number of shares available for grant under the Plan or extend the term of the Plan. The Plan is administered by the Compensation Committee of Insight’s Board of Directors, and, except as provided below, the Compensation Committee has the exclusive authority to administer the Plan, including the power to determine eligibility, the types of awards to be granted, the price and the timing of awards. Under the Plan, the Compensation Committee may delegate some of its authority to our Chief Executive Officer to grant awards to individuals other than individuals who are subject to the reporting requirements of Section 16(a) of the Securities Exchange Act of 1934, as amended. As of December 31, 2018, of the 7,250,000 2,791,688 Accounting for Restricted Stock Units We issue RSUs as incentives to certain officers and teammates and as compensation to members of our Board of Directors. We recognize compensation expense associated with the issuance of such RSUs over the vesting period for each respective RSU. The total compensation expense associated with RSUs represents the value based upon the number of RSUs awarded multiplied by the closing price of our common stock on the date of grant. The number of RSUs to be awarded under our service-based RSUs is fixed at the grant date. The number of RSUs ultimately awarded under our performance-based RSUs varies based on whether the Company achieves certain financial results. We record compensation expense each period based on our estimate of the most probable number of RSUs that will be issued under the grants of performance-based RSUs. Recipients of RSUs do not have voting or dividend rights until the vesting conditions are satisfied and shares are released. As of December 31, 2018, total compensation cost related to nonvested RSUs not yet recognized is $ 21,104 1.31 The following table summarizes our RSU activity during 2018: Number Weighted Average Grant Date Fair Value Fair Value Nonvested at the beginning of year 892,113 $ 32.86 Granted 557,823 $ 36.79 Vested, including shares withheld to cover taxes (383,672 ) $ 29.80 $ 14,302,223 (a) Forfeited (45,334 ) $ 34.10 Nonvested at the end of year 1,020,930 $ 36.10 $ 41,602,898 (b) (f) The aggregate fair value of vested RSUs represents the total pre-tax fair value, based on the closing stock price on the day of vesting, which would have been received by holders of RSUs had all such holders sold their underlying shares on that date. The aggregate intrinsic value for RSUs which vested during 2017 and 2016 was $20,284,762 and $9,235,102, respectively. (g) The aggregate fair value of the nonvested RSUs and the RSUs expected to vest represents the total pre-tax fair value, based on our closing stock price of $40.75 During each of the years in the three-year period ended December 31, 2018, the RSUs that vested for teammates in the United States were net-share settled such that we withheld shares with value equivalent to the teammates’ minimum statutory United States tax obligation for the applicable income and other employment taxes and remitted the equivalent cash amount to the appropriate taxing authorities. The total shares withheld during 2018, 2017 and 2016 of 88,638

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	( 1 1 ) Income Taxes The following table presents the United States (“U.S.”) and foreign components of earnings before income taxes and the related income tax expense (in thousands): Years Ended December 31, 2018 2017 2016 Earnings before income taxes: United States $ 145,907 $ 119,330 $ 99,095 Foreign 65,995 39,768 40,363 $ 211,902 $ 159,098 $ 139,458 Income tax expense: Current: U.S. Federal $ 18,334 $ 31,067 $ 27,947 U.S. State and local 3,218 3,636 2,200 Foreign 17,547 14,573 14,104 39,099 49,276 44,251 Deferred: U.S. Federal 8,123 20,327 10,395 U.S. State and local 1,142 (427 ) 1,088 Foreign (139 ) (761 ) (966 ) 9,126 19,139 10,517 $ 48,225 $ 68,415 $ 54,768 The following schedule reconciles the differences between the U.S. federal income taxes at the U.S. statutory rate and our income tax expense (dollars in thousands): 2018 2017 2016 Statutory federal income tax rate $ 44,499 21.0 % $ 55,684 35.0 % $ 48,810 35.0 % State income tax expense, net of federal income tax benefit 6,767 3.2 2,808 1.8 3,368 2.4 Audits and adjustments, net 2,659 1.3 (313 ) (0.2 ) (1,039 ) (0.7 ) Change in valuation allowances 60 — 2,472 1.5 3,742 2.7 Foreign income taxed at different rates 2,639 1.2 (6,057 ) (3.8 ) (6,611 ) (4.7 ) U.S. mandatory deemed repatriation (1,396 ) (0.7 ) 5,625 3.5 — — Adjustment of net deferred tax assets for enacted U.S. federal tax reform (4,198 ) (2.0 ) 7,738 4.9 — — Research and development credits (4,132 ) (1.9 ) — — — — Change in U.S. tax law applicable to certain foreign entities — — — — 2,577 1.8 Non-deductible compensation 1,399 0.7 571 0.4 518 0.4 Other, net (72 ) — (113 ) (0.1 ) 3,403 2.4 Effective tax rate $ 48,225 22.8 % $ 68,415 43.0 % $ 54,768 39.3 % In December 2017, U.S. federal tax reform was enacted as part of the U.S. Tax Cuts and Jobs Act. As part of the change in tax law, beginning in 2018, the U.S. statutory federal income tax rate was reduced from 35% to 21%. This reduction required a remeasurement of our deferred tax balances that resulted in an increase in our 2017 income tax expense. In addition, the change in tax law included provisions requiring mandatory deemed repatriation of undistributed foreign earnings. In 2017 and the first nine months of 2018, we recorded provisional amounts for certain tax enactment-date effects of the new law by applying the guidance of SAB 118 because we had not yet completed our enactment-date accounting for these effects. In 2017 and 2018, the company recorded tax expense and benefit, respectively, related to the new tax law that included remeasurement of U.S. deferred income taxes, the mandatory deemed repatriation provision and the state tax effects of these items. The changes to 2017 provisional amounts resulted in a benefit of $5.6 million, which reduced our annual effective tax rate by 2.7% in 2018. At December 31, 2018 the accounting for the enactment-date income tax effects for the new tax law are completed. U.S. federal tax reform subjects a U.S. corporation to tax on its global intangible low-taxed income (GILTI). U.S. GAAP allows companies to make an accounting policy election to either (1) treat taxes due on future GILTI inclusions in U.S. taxable income as a current-period expense when incurred (“period cost method”) or (2) factor such amounts into the measurement of its deferred taxes (“deferred method”). We have elected to use the period cost method . A change in U.S. tax law was enacted in December 2016 related to the taxation of foreign currency translation gains or losses arising from qualified business units. The change, which increased our U.S. federal income taxes, affects our foreign entities that are treated as branches for U.S. tax purposes. The “Other, net” line item in the schedule above includes $349,000 and $1,296,000 related to the effect of non-deductible acquisition-related expenses incurred during 2017 and 2016, respectively. For foreign entities not treated as branches for U.S. tax purposes, historically, we did not provide for U.S. income taxes on the undistributed earnings of these subsidiaries as these earnings were considered to be reinvested and, in the opinion of management, would continue to be reinvested indefinitely outside of the United States. As a result of U.S. federal tax reform enacted during December 2017, all undistributed foreign earnings are deemed distributed. The significant components of deferred tax assets and liabilities are as follows (in thousands): December 31, 2018 2017 Deferred tax assets: Net operating losses $ 23,926 $ 25,418 Foreign tax credits 16,800 21,346 Accruals 4,242 5,921 Stock-based compensation 3,173 3,023 Property and equipment 2,008 1,111 Accounts receivable 1,980 2,124 Goodwill and other intangibles 1,296 4,717 Deferred revenue 1,016 600 Inventories 133 1,930 Other 2,487 335 Gross deferred tax assets 57,061 66,525 Valuation allowances (40,630 ) (45,995 ) Total deferred tax assets 16,431 20,530 Deferred tax liabilities: Inventories (4,885 ) — Accrued withholding tax (1,303 ) (1,452 ) Goodwill and other intangibles (1,202 ) (1,587 ) Other (1,757 ) (1,144 ) Total deferred tax liabilities (9,147 ) (4,183 ) Net deferred tax assets $ 7,284 $ 16,347 The net non-current deferred tax assets and liabilities are as follows (in thousands): December 31, 2018 2017 Net non-current deferred tax assets $ 7,967 $ 17,064 Net non-current deferred tax liabilities (683 ) (717 ) Net deferred tax assets $ 7,284 $ 16,347 As of December 31, 2018, we have a federal net operating loss carryforward (“NOL”) of $252,000 and U.S. state NOLs of $1,403,000 that will expire between 2019 and 2037. We also have NOLs from various non-U.S. jurisdictions of $84,266,000. While the majority of the non-U.S. NOLs have no expiration date, $5,329,000 will expire between 2019 and 2025. On the basis of currently available information, we have provided valuation allowances for certain of our deferred tax assets where we believe it is more likely than not that the related tax benefits will not be realized. At December 31, 2018 and 2017, our valuation allowances totaled $40,630,000 and $45,995,000, respectively, representing non-U.S. NOLs, foreign depreciation allowances and foreign tax credits. We believe it is more likely than not that forecasted income, including income that may be generated as a result of prudent and feasible tax planning strategies, together with the tax effects of deferred tax liabilities, will be sufficient to fully recover our remaining deferred tax assets. In the future, if we determine that realization of the remaining deferred tax assets and the availability of certain previously paid taxes to be refunded are not more likely than not, we will need to increase our valuation allowances and record additional income tax expense. The following table summarizes the change in the valuation allowance (in thousands): December 31, 2018 2017 Valuation allowances at beginning of year $ 45,995 $ 30,972 Increase in income tax expense 60 2,472 U.S. federal tax reform (1,589 ) 11,623 Foreign currency translation adjustments (1,180 ) 2,865 Other (2,656 ) (1,937 ) Valuation allowances at end of year $ 40,630 $ 45,995 The change in our valuation allowance related to U.S. federal tax reform in the table above was primarily related to U.S. mandatory deemed repatriation. Various taxing jurisdictions are examining our tax returns for certain tax years. Although the outcome of tax audits cannot be predicted with certainty, management believes the ultimate resolution of these examinations will not result in a material adverse effect to our financial position, results of operations or cash flows. As of December 31, 2018 and 2017, we had approximately $6,849,000 and $4,273,000, respectively, of unrecognized tax benefits. Of these amounts, approximately $313,000 and $287,000, respectively, related to accrued interest Balance at December 31, 2017 $ 3,986 Additions for tax positions in prior periods 1,613 Additions for tax positions in current period 2,014 Subtractions due to foreign currency translation (8 ) Subtractions due to audit settlements and statute expirations (1,069 ) Balance at December 31, 2018 $ 6,536 In the future, if recognized, the liability associated with uncertain tax positions would affect our effective tax rate. We do not believe there will be any changes over the next 12 months that would have a material effect on our effective tax rate. Several of our subsidiaries are currently under audit for tax years 2012 through 2017. Although the timing of the resolutions and/or closures of audits is highly uncertain, it is reasonably possible that the examination phase of these audits may be concluded within the next 12 months which could significantly increase or decrease the balance of our gross unrecognized tax benefits. We, including our subsidiaries, file income tax returns in the U.S. federal jurisdiction and many state and local and non-U.S. jurisdictions. In the United States, federal income tax returns for 2014, 2015, 2016, 2017 and 2018 remain open to examination. For U.S. state

Market Risk Management

Market Risk Management	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Market Risk Management	( 1 2 ) Market Risk Management Interest Rate Risk We have interest rate exposure arising from our financing facilities, which have variable interest rates. These variable interest rates are affected by changes in short-term interest rates. We currently do not hedge our interest rate exposure. We do not believe that the effect of reasonably possible near-term changes in interest rates will be material to our financial position, results of operations and cash flows. Our financing facilities expose our net earnings to changes in short-term interest rates since interest rates on the underlying obligations are variable. We had no amounts outstanding under our revolving facility and TLA and $194,000,000 outstanding under our ABS facility at December 31, 2018. The interest rate attributable to the borrowings under our revolving facility and our ABS facility was 3.66% Foreign Currency Exchange Risk We have foreign currency exchange risk related to the translation of our foreign subsidiaries’ operating results, assets and liabilities (see Note 1 for a description of our Foreign Currencies policy). We also maintain cash accounts denominated in currencies other than the functional currency, which expose us to fluctuations in foreign exchange rates. Remeasurement of these cash balances results in gains/losses that are also reported as a separate component of non-operating (income) expense. We monitor our foreign currency exposure and selectively enter into forward exchange contracts to mitigate risk associated with certain non-functional currency monetary assets and liabilities related to foreign denominated payables, receivables and cash balances. Transaction gains and losses resulting from non-functional currency assets and liabilities are offset by gains and losses on forward contracts in non-operating (income) expense, net in our consolidated statements of operations

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	( 1 3 ) Fair Value Measurements Fair value measurements are determined based on the following three categories: Level 1: Quoted market prices in active markets for identical assets or liabilities. Level 2: Observable market based inputs or unobservable inputs that are corroborated by market data. Level 3: Unobservable inputs that are not corroborated by market data. We have elected to use the income approach to value our foreign exchange derivatives, using observable Level 2 market expectations at the measurement date and standard valuation techniques to convert future amounts to a single present value amount assuming that participants are motivated, but not compelled, to transact. Level 2 inputs for the valuations are limited to quoted prices for similar assets or liabilities in active markets and inputs other than quoted prices that are observable for the asset or liability (specifically LIBOR rates, foreign exchange rates, and foreign exchange forward points). Mid-market pricing is used as a practical expedient for fair value measurements. Fair value measurement of an asset or liability must reflect the nonperformance risk of the entity and the counterparty. Therefore, the impact of the counterparty’s creditworthiness when in an asset position and the Company’s creditworthiness when in a liability position has also been factored into the fair value measurement of the derivative instruments and did not have a material impact on the fair value of these derivative instruments. Both the counterparty and the Company are expected to continue to perform under the contractual terms of the instruments. As of December 31, 2018, we have no non-financial assets or liabilities that are measured and recorded at fair value on a recurring basis, and our other financial assets or liabilities generally consist of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses and other current liabilities and long-term debt. The estimated fair values of our cash and cash equivalents approximate their carrying values and are determined based on quoted prices in active markets for identical assets (Level 1). The estimated fair values of our long-term debt balances approximate their carrying values based on their variable interest rate terms that are based on current market interest rates for similar debt instruments. The fair values of the other financial assets and liabilities are based on the values that would be received or paid in an orderly transaction between market participants and approximate their carrying values due to their nature and short duration.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2018
Compensation And Retirement Disclosure [Abstract]
Benefit Plans	( 1 4 ) Benefit Plans We adopted a defined contribution benefit plan (the “Defined Contribution Plan”) for our U.S. teammates which complies with section 401(k) of the Internal Revenue Code. The Company provides a discretionary match to all participants who make 401(k) contributions pursuant to the Defined Contribution Plan. The discretionary match provided to participants is equivalent to 50% of a participant’s pre-tax contributions up to a maximum of 6% of eligible compensation per pay period. Additionally, we offer several defined contribution benefit plans to our teammates outside of the United States. These plans and their related terms vary by country. Total consolidated contribution expense under these plans was $15,216,000, $14,083,000 and $7,684,000 for 2018, 2017 and 2016, respectively.

Share Repurchase Programs

Share Repurchase Programs	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Share Repurchase Programs	( 1 5 ) Share Repurchase Programs In each of February 2018 and February 2016, our Board of Directors authorized share repurchase programs of $50,000,000. No share repurchase program was authorized in 2017. The following table summarizes the shares of our common stock that we repurchased on the open market under these repurchase programs during the years ended December 31, 2018, 2017 and 2016, respectively, in thousands, except per share amounts: Year Total Number of Shares Purchased Average Price Paid per Share Approximate Dollar Value of Shares Purchased 2018 641 $ 34.42 $ 22,069 2017 — — — 2016 1,891 26.43 50,000 Total 2,532 $ 72,069 All shares repurchased were retired.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	( 1 6 ) Commitments and Contingencies Contractual In the ordinary course of business, we issue performance bonds to secure our performance under certain contracts or state tax requirements. As of December 31, 2018, we had approximately $3,725,000 of performance bonds outstanding. These bonds are issued on our behalf by a surety company on an unsecured basis; however, if the surety company is ever required to pay out under the bonds, we have contractually agreed to reimburse the surety company. Management believes that payments, if any, related to these performance bonds are not probable at December 31, 2018. Accordingly, we have not accrued any liabilities related to such performance bonds in our consolidated financial statements. Employment Contracts and Severance Plans We have employment contracts with, and plans covering, certain officers and management teammates under which severance payments would become payable in the event of specified terminations without cause or terminations under certain circumstances after a change in control. In addition, vesting of outstanding nonvested RSUs would accelerate following a change in control. If severance payments under the current employment agreements or plan payments were to become payable, the severance payments would generally range from three to twenty-four months of salary. Indemnifications From time to time, in the ordinary course of business, we enter into contractual arrangements under which we agree to indemnify either our clients or third-party service providers from certain losses incurred relating to services performed on our behalf or for losses arising from defined events, which may include litigation or claims relating to past performance. These arrangements include, but are not limited to, the indemnification of our clients for certain claims arising out of our performance under our sales contracts, the indemnification of our landlords for certain claims arising from our use of leased facilities and the indemnification of the lenders that provide our credit facilities for certain claims arising from their extension of credit to us. Such indemnification obligations may not be subject to maximum loss clauses. Management believes that payments, if any, related to these indemnifications are not probable at December 31, 2018. Accordingly, we have not accrued any liabilities related to such indemnifications in the accompanying consolidated financial statements. We have entered into separate indemnification agreements with certain of our executive officers and with each of our directors. These agreements require us, among other requirements, to indemnify such officers and directors against expenses (including attorneys’ fees), judgments and settlements incurred by such individual in connection with any action arising out of such individual’s status or service as our executive officer or director (subject to exceptions such as where the individual failed to act in good faith or in a manner the individual reasonably believed to be in, or not opposed to, the best interests of the Company) and to advance expenses incurred by such individual with respect to which such individual may be entitled to indemnification by us. There are no pending legal proceedings that involve the indemnification of any of the Company’s directors or officers. Contingencies Related to Third-Party Review From time to time, we are subject to potential claims and assessments from third parties. We are also subject to various governmental, client and partner audits. We continually assess whether or not such claims have merit and warrant accrual. Where appropriate, we accrue estimates of anticipated liabilities in our consolidated financial statements. Such estimates are subject to change and may affect our results of operations and our cash flows. Legal Proceedings From time to time, we are party to various legal proceedings arising in the ordinary course of business, including preference payment claims asserted in client bankruptcy proceedings, indemnification claims, claims of alleged infringement of patents, trademarks, copyrights and other intellectual property rights, claims of alleged non-compliance with contract provisions and claims related to alleged violations of laws and regulations. We regularly evaluate the status of the legal proceedings in which we are involved to assess whether a loss is probable or there is a reasonable possibility that a loss, or an additional loss, may have been incurred and determine if accruals are appropriate. If accruals are not appropriate, we further evaluate each legal proceeding to assess whether an estimate of possible loss or range of possible loss can be made for disclosure. Although litigation is inherently unpredictable, we believe that we have adequate provisions for any probable and estimable losses. It is possible, nevertheless, that our consolidated financial position, results of operations or liquidity could be materially and adversely affected in any particular period by the resolution of a legal proceeding. Legal expenses related to defense, negotiations, settlements, rulings and advice of outside legal counsel are expensed as incurred. The Company is not involved in any pending or threatened legal proceedings that it believes would reasonably be expected to have a material adverse effect on its business, financial condition or results of operations.

Supplemental Financial Informat

Supplemental Financial Information	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Supplemental Financial Information	( 1 7 ) Supplemental Financial Information Additions and deductions related to the allowance for doubtful accounts receivable for 2018, 2017 and 2016 were as follows (in thousands): Balance at Beginning of Year Additions Deductions Balance at End of Year Allowance for doubtful accounts receivable: Year ended December 31, 2018 $ 10,158 $ 4,776 $ (4,472 ) $ 10,462 Year ended December 31, 2017 $ 9,138 $ 5,245 $ (4,225 ) $ 10,158 Year ended December 31, 2016 $ 11,872 $ 2,452 $ (5,186 ) $ 9,138

Cash Flows

Cash Flows	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Cash Flows	( 18 ) Cash Flows Cash payments for interest on indebtedness and cash payments for taxes on income were as follows (in thousands): Years Ended December 31, 2018 2017 2016 Supplemental disclosures of cash flow information: Cash paid during the year for interest $ 10,155 $ 10,976 $ 3,782 Cash paid during the year for income taxes, net of refunds $ 31,218 $ 55,470 $ 39,051 Non-cash investing activities for 2018, 2017 and 2016 included $1,170,000, $159,000 and $791,000, respectively, of capital expenditures in accounts payable, representing additions purchased at period end but not yet paid for in cash.

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Segment and Geographic Information	( 19 ) Segment and Geographic Information We operate in three reportable geographic operating segments: North America; EMEA; and APAC. Our offerings in North America and certain countries in EMEA and APAC include IT hardware, software and services. Our offerings in the remainder of our EMEA and APAC segments are largely software and certain software-related services. The following tables summarize net sales by offering for North America, EMEA and APAC by sales mix amounts (in thousands): North America Years Ended December 31, Sales Mix 2018 2017 2016 Hardware $ 3,610,356 $ 3,352,355 $ 2,454,889 Software 1,112,715 1,310,118 1,146,808 Services 639,910 519,261 370,131 $ 5,362,981 $ 5,181,734 $ 3,971,828 EMEA Years Ended December 31, Sales Mix 2018 2017 2016 Hardware $ 653,499 $ 536,500 $ 481,505 Software 736,509 710,452 762,427 Services 140,233 108,464 94,628 $ 1,530,241 $ 1,355,416 $ 1,338,560 APAC Years Ended December 31, Sales Mix 2018 2017 2016 Hardware $ 29,496 $ 27,907 $ 18,916 Software 107,363 101,412 132,718 Services 50,055 37,154 23,493 $ 186,914 $ 166,473 $ 175,127 The method for determining what information regarding operating segments, products and services, geographic areas of operation and major clients to report is based upon the “management approach,” or the way that management organizes the operating segments within a company, for which separate financial information is evaluated regularly by the Chief Operating Decision Maker (“CODM”) in deciding how to allocate resources. Our CODM is our Chief Executive Officer. All significant intercompany transactions are eliminated upon consolidation, and there are no differences between the accounting policies used to measure profit and loss for our segments or on a consolidated basis. Net sales are defined as net sales to external clients. None of our clients exceeded ten percent of consolidated net sales in 2018, 2017 or 2016. A portion of our operating segments’ selling and administrative expenses arise from shared services and infrastructure that we have historically provided to them in order to realize economies of scale and to use resources efficiently. These expenses, collectively identified as corporate charges, include senior management expenses, internal audit, legal, tax, insurance services, treasury and other corporate infrastructure expenses. Charges are allocated to our operating segments, and the allocations have been determined on a basis that we considered to be a reasonable reflection of the utilization of services provided to or benefits received by the operating segments. The tables below present information about our reportable operating segments (in thousands): Year Ended December 31, 2018 North America EMEA APAC Consolidated Net Sales: Products $ 4,723,071 $ 1,390,008 $ 136,859 $ 6,249,938 Services 639,910 140,233 50,055 830,198 Total net sales 5,362,981 1,530,241 186,914 7,080,136 Costs of goods sold: Products 4,313,070 1,273,422 124,908 5,711,400 Services 317,216 35,352 22,450 375,018 Total costs of goods sold 4,630,286 1,308,774 147,358 6,086,418 Gross profit 732,695 221,467 39,556 993,718 Operating expenses: Selling and administrative expenses 545,091 182,470 28,968 756,529 Severance and restructuring expenses 1,617 1,677 130 3,424 Acquisition-related expenses 282 — — 282 Earnings from operations $ 185,705 $ 37,320 $ 10,458 $ 233,483 Year Ended December 31, 2017 North America EMEA APAC Consolidated Net Sales: Products $ 4,662,473 $ 1,246,952 $ 129,319 $ 6,038,744 Services 519,261 108,464 37,154 664,879 Total net sales 5,181,734 1,355,416 166,473 6,703,623 Costs of goods sold: Products 4,253,587 1,140,204 118,611 5,512,402 Services 236,470 24,902 11,279 272,651 Total costs of goods sold 4,490,057 1,165,106 129,890 5,785,053 Gross profit 691,677 190,310 36,583 918,570 Operating expenses: Selling and administrative expenses 530,792 164,305 28,231 723,328 Severance and restructuring expenses 4,010 4,888 104 9,002 Loss on sale of foreign entity — 3,646 — 3,646 Acquisition-related expenses 3,223 106 — 3,329 Earnings from operations $ 153,652 $ 17,365 $ 8,248 $ 179,265 Year Ended December 31, 2016 North America EMEA APAC Consolidated Net Sales: Products $ 3,601,697 $ 1,243,932 $ 151,634 $ 4,997,263 Services 370,131 94,628 23,493 488,252 Total net sales 3,971,828 1,338,560 175,127 5,485,515 Costs of goods sold: Products 3,301,148 1,129,917 140,397 4,571,462 Services 145,199 22,956 2,796 170,951 Total costs of goods sold 3,446,347 1,152,873 143,193 4,742,413 Gross profit 525,481 185,687 31,934 743,102 Operating expenses: Selling and administrative expenses 401,316 160,269 23,658 585,243 Severance and restructuring expenses 2,966 1,496 118 4,580 Acquisition-related expenses 4,278 — 169 4,447 Earnings from operations $ 116,921 $ 23,922 $ 7,989 $ 148,832 The following table is a summary of our total assets by reportable operating segment (in thousands): December 31, 2018 December 31, 2017 North America $ 2,660,886 $ 2,337,573 EMEA 611,338 530,242 APAC 98,959 101,169 Corporate assets and intercompany eliminations, net (595,236 ) (283,333 ) Total assets $ 2,775,947 $ 2,685,651 The following is a summary of our geographic net sales and long-lived assets, consisting of property and equipment, net (in thousands): United States United Kingdom Other Foreign Total 2018 Net sales $ 5,100,456 $ 843,145 $ 1,136,535 $ 7,080,136 Total long-lived assets $ 52,346 $ 12,434 $ 8,174 $ 72,954 2017 Net sales $ 4,933,805 $ 684,632 $ 1,085,186 $ 6,703,623 Total long-lived assets $ 50,462 $ 14,783 $ 10,007 $ 75,252 2016 Net sales $ 3,776,352 $ 671,999 $ 1,037,164 $ 5,485,515 Net sales by geographic area are presented by attributing net sales to external customers based on the domicile of the selling location. We recorded the following pre-tax amounts, by operating segment, for depreciation and amortization in the accompanying consolidated financial statements (in thousands): Years Ended December 31, 2018 2017 2016 Depreciation and amortization of property and equipment: North America $ 17,164 $ 20,241 $ 21,952 EMEA 4,058 5,025 4,908 APAC 499 521 633 21,721 25,787 27,493 Amortization of intangible assets: North America 14,791 15,971 8,139 EMEA 285 73 1,951 APAC 661 768 547 15,737 16,812 10,637 Total $ 37,458 $ 42,599 $ 38,130

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisitions	( 20 ) Acquisitions Cardinal Effective August 1, 2018, we acquired 100 percent of the issued and outstanding shares of Cardinal, a digital solutions provider based in Cincinnati, Ohio, with offices across the Midwest and Southeast United States, for a cash purchase price, net of cash acquired, of approximately $78,800,000, including working capital and estimated tax adjustments of $3,800,000. Cardinal provides technology solutions to digitally transform organizations through their expertise in mobile applications development, Internet of Things and cloud enabled business intelligence. We believe that this acquisition strengthens our services capabilities and will bring value to our clients within our digital innovation services solution offering. The fair value of net assets acquired was approximately $42,360,000, including $27,540,000 of identifiable intangible assets, consisting primarily of customer relationships that will be amortized using the straight line method over the estimated economic life of ten years. The fair value of the customer relationships was determined using the multiple-period excess earnings method. The preliminary purchase price was allocated using the acquisition method of accounting using the information available at the time. During the fourth quarter of 2018 we finalized the fair value assumptions for identifiable intangible assets with no changes being made to amounts previously recorded. Goodwill acquired approximated $36,440,000 which was recorded in our North America operating segment. The goodwill is tax deductible. The working capital adjustment was finalized in the fourth quarter of 2018. We will finalize the purchase price allocation in 2019 when the final tax adjustment is completed and agreed upon. We consolidated the results of operations for Cardinal within our North America operating segment beginning on August 1, 2018, the effective date of the acquisition. Our historical results would not have been materially affected by the acquisition of Cardinal and, accordingly, we have not presented pro forma information as if the acquisition had been completed at the beginning of each period presented in our statement of operations. Caase.com Effective September 26, 2017, we acquired Caase.com, a Dutch cloud service provider, for a purchase price, net of cash acquired, of approximately $6,038,000, subject to a final working capital adjustment. We believe that this acquisition strengthened our ability to deliver cloud and data center solutions to our clients in the Netherlands, with a view to expand into the wider European region in the near future. The total fair value of net identifiable assets acquired was approximately $2,107,000, including $68,000 of cash acquired and $2,039,000 of identifiable intangible assets, consisting primarily of customer relationships. The customer relationships identifiable intangible asset is being amortized using the straight-line method over its estimated economic life of 8 years. The preliminary purchase price was allocated under the acquisition method of accounting using the information available at the time. During the fourth quarter of 2017, we finalized the fair value assumptions for identifiable intangible assets acquired and reduced the fair value of identifiable intangible assets acquired by approximately $193,000. Goodwill initially recorded of approximately $4,117,000, which was recorded in our EMEA operating segment, was adjusted to $4,041,000 as of December 31, 2017 as a result of the net effects of the decrease in the value of acquired identifiable intangible assets noted previously, adjustments for deferred taxes and foreign currency translation adjustments. None of the goodwill is tax deductible. We finalized the purchase price allocation in the third quarter of 2018 when the final working capital adjustment was agreed upon and paid and the evaluation of uncertain tax positions was completed. We consolidated the results of operations for Caase.com within our EMEA operating segment beginning on the effective date of the acquisition. Our historical results would not have been materially affected by the acquisition of Caase.com and, accordingly, we have not presented pro forma information as if the acquisition had been completed at the beginning of each period presented in our statements of operations. Datalink On January 6, 2017, we completed our acquisition of Datalink, a leading provider of IT services and enterprise data center solutions based in Eden Prairie, Minnesota, for a cash purchase price of $257,456,000, which included cash and cash equivalents acquired of $76,597,000. We believe that this acquisition strengthened our position as a leading IT solutions provider with deep technical talent delivering data center solutions to clients on premise or in the cloud. The following table summarizes the purchase price and the estimated fair value of the assets acquired and liabilities assumed at the date of acquisition (in thousands): Total purchase price $ 257,456 Fair value of net assets acquired: Current assets $ 238,577 Identifiable intangible assets – see description below 94,500 Property and equipment 5,843 Other assets 17,888 Current liabilities (129,071 ) Long-term liabilities, including deferred taxes (34,421 ) Total fair value of net assets acquired 193,316 Excess purchase price over fair value of net assets acquired (“goodwill”) $ 64,140 Under the acquisition method of accounting, the total purchase price as shown in the table above was allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The excess of the purchase price over fair value of net assets acquired was recorded as goodwill. The estimated fair values of current assets and liabilities (other than deferred revenue and related deferred costs) were based upon their historical costs on the date of acquisition due to their short-term nature. The majority of property and equipment were also estimated based upon historical costs as they approximated fair value. Certain long-term assets, including Datalink’s IT system, were written down to the estimated fair value based on the economic benefit expected to be realized from the assets following the acquisition. Deferred revenue acquired primarily represents monies collected prior to January 6, 2017 related to unearned revenues associated with support services to be performed in the future. The estimated fair value of deferred revenue of $65,500,000, which is included in current and long-term liabilities in the table above, was calculated using the adjusted fulfillment cost method as the present value of the costs expected to be incurred by a third party to perform the support services obligations acquired under various customer contracts, plus a reasonable profit associated with the performance effort. The deferred costs acquired represent monies paid prior to January 6, 2017 to purchase third party customer support contracts from manufacturers. The estimated fair value of the deferred costs of $48,029,000, which is included in current and other assets in the table above, was calculated in conjunction with the valuation of deferred revenue discussed above. Identified intangible assets of $94,500,000 consist primarily of customer relationships, the trade name and non-compete agreements, which were valued at $92,200,000, $2,200,000 and $100,000, respectively. These values were determined using the multiple-period excess earnings method, the relief from royalty method and the lost income method, respectively. The identifiable intangibles resulting from the acquisition are amortized using the straight-line method over the following estimated useful lives: Intangible Assets Estimated Economic Life Customer relationships 10 Years Trade name 1 Year Non-compete agreements 1 Year Amortization expense recognized for the period from the acquisition date through December 31, 2017 was $11,520,000. Goodwill of $64,140,000, which was recorded in our North America operating segment, represents the excess of the purchase price over the estimated fair value assigned to tangible and identifiable intangible assets acquired and liabilities assumed from Datalink. The addition of the Datalink technical employees to our team and the opportunity to grow our data center solutions business are the primary factors making up the goodwill recognized as part of the transaction. None of the goodwill is tax deductible. The preliminary purchase price was allocated using information available at the time. During the second quarter of 2017, upon analysis of additional information affecting our estimate of the fair value of net assets acquired, we adjusted the purchase price allocation and reduced the goodwill balance by $945,000. During the remainder of 2017, no further adjustments to the purchase price allocation were made, and the purchase price allocation was finalized. We consolidated the results of operations for Datalink since its acquisition on January 6, 2017. Consolidated net sales and gross profit for the year ended December 31, 2017 include $524,281,000 and $118,917,000, respectively, from Datalink. The following table reports pro forma information as if the acquisition of Datalink had been completed at the beginning of the earliest period presented (in thousands, except per share amounts): Year Ended December 31, 2017 2016 Net sales As reported $ 6,703,623 $ 5,485,515 Proforma $ 6,707,533 $ 6,084,484 Net earnings As reported $ 90,683 $ 84,690 Proforma $ 92,276 $ 85,823 Diluted earnings per share As reported $ 2.50 $ 2.32 Proforma $ 2.55 $ 2.36 Ignia Effective September 1, 2016, we acquired Ignia, a business technology consulting and managed services provider headquartered in Perth, Australia, with an additional office in Melbourne, for a cash purchase price, net of cash acquired, of approximately $10,804,000, subject to a final working capital adjustment. We believe that this acquisition expands our global footprint in the areas of application design, digital solutions, cloud, mobility and business analytics, while also building on our unique position to bring digital innovation solutions to our clients in the Asia-Pacific region. The total fair value of net identifiable assets acquired initially recorded was approximately $5,324,000, including $1,463,000 of cash acquired and $4,716,000 of identifiable intangible assets, consisting primarily of customer relationships and restrictive covenant agreements which are being amortized using the straight-line method over their estimated economic lives of eight years and 27 months, respectively. The preliminary purchase price was allocated using the information available at the time. During the fourth quarter of 2016, we finalized the fair value assumptions for identifiable intangible assets acquired and reduced the fair value of identifiable intangible assets acquired by approximately $218,000. Goodwill initially recorded of approximately $7,248,000, which was recorded in our APAC operating segment, was adjusted to $6,957,000 as of December 31, 2016 as a result of the net effects of the decrease in the value of acquired identifiable intangible assets noted previously and foreign currency translation adjustments. None of the goodwill is tax deductible. We finalized the purchase price allocation in the second quarter of 2017 when the final working capital adjustment was agreed upon. We consolidated the results of operations for Ignia within our APAC operating segment beginning on September 1, 2016, the effective date of the acquisition. Our historical results would not have been materially affected by the acquisition of Ignia and, accordingly, we have not presented pro forma information as if the acquisition had been completed at the beginning of each period presented in our statements of operations.

Assets Held for Sale

Assets Held for Sale	12 Months Ended
	Dec. 31, 2018
Discontinued Operations, Disposed of by Sale [Member] | Russia [Member]
Assets Held for Sale	( 2 1 ) Sale of Foreign Entity On July 19, 2017, we concluded the sale of our operations in Russia, formerly a part of our EMEA operating segment, to one of our global partners that is focused in the region. We recorded a loss on the sale of the foreign entity of approximately $3,646,000 during the third quarter of 2017, including a $2,903,000 charge upon the release of our cumulative translation adjustment account balance as of the sale date.

Selected Quarterly Financial In

Selected Quarterly Financial Information	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Selected Quarterly Financial Information	( 2 2 ) Selected Quarterly Financial Information (unaudited) The following tables set forth selected unaudited consolidated quarterly financial information for 2018 and 2017 (in thousands, except per share data): Quarters Ended December 31, 2018 September 30, 2018 June 30, 2018 (1) March 31, 2018 (1) Net sales $ 1,749,046 $ 1,747,726 $ 1,840,870 $ 1,742,494 Costs of goods sold 1,494,882 1,512,812 1,576,493 1,502,231 Gross profit 254,164 234,914 264,377 240,263 Operating expenses: Selling and administrative expenses 194,790 184,095 189,464 188,180 Severance and restructuring expenses 715 683 382 1,644 Acquisition-related expenses — 188 94 — Earnings from operations 58,659 49,948 74,437 50,439 Non-operating (income) expense: Interest income (422 ) (330 ) (170 ) (153 ) Interest expense 5,563 6,132 5,102 6,015 Net foreign currency exchange (gain) loss (1,517 ) 539 (275 ) (245 ) Other expense, net 323 393 324 302 Earnings before income taxes 54,712 43,214 69,456 44,520 Income tax expense 7,671 11,060 17,977 11,517 Net earnings $ 47,041 $ 32,154 $ 51,479 $ 33,003 Net earnings per share: Basic $ 1.33 $ 0.91 $ 1.45 $ 0.92 Diluted $ 1.31 $ 0.89 $ 1.44 $ 0.91 Shares used in per share calculations: Basic 35,480 35,468 35,483 35,913 Diluted 35,999 35,957 35,815 36,263 Quarters Ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Net sales $ 1,784,075 $ 1,757,973 $ 1,684,032 $ 1,477,543 Costs of goods sold 1,551,192 1,531,892 1,432,653 1,269,316 Gross profit 232,883 226,081 251,379 208,227 Operating expenses: Selling and administrative expenses 184,554 180,390 180,752 177,632 Severance and restructuring expenses 2,791 494 1,022 4,695 Loss on sale of foreign entity — 3,646 — — Acquisition-related expenses — 106 276 2,947 Earnings from operations 45,538 41,445 69,329 22,953 Non-operating (income) expense: Interest income (346 ) (227 ) (205 ) (431 ) Interest expense 5,360 5,555 4,326 3,933 Net foreign currency exchange (gain) loss (117 ) 341 251 380 Other expense, net 367 339 326 315 Earnings before income taxes 40,274 35,437 64,631 18,756 Income tax expense 26,106 13,025 24,376 4,908 Net earnings $ 14,168 $ 22,412 $ 40,255 $ 13,848 Net earnings per share: Basic $ 0.40 $ 0.63 $ 1.13 $ 0.39 Diluted $ 0.39 $ 0.62 $ 1.11 $ 0.38 Shares used in per share calculations: Basic 35,809 35,787 35,765 35,602 Diluted 36,272 36,203 36,169 36,185 (1) During the quarter ended September 30, 2018, we revised our previously issued March 31, 2018 and June 30, 2018 consolidated financial statements for immaterial errors identified. The errors primarily relate to incorrect presentation of certain software revenue transactions. The effect of the revision on our consolidated statements of operations for the three months ended March 31, 2018 was to reduce product net sales by $24,364,000, increase services net sales by $3,953,000, reduce product cost of goods sold by $23,749,000 and increase services cost of goods sold by $3,080,000. For the three months ended March 31, 2018, gross profit, earnings from operations and net earnings increased by $258,000. Diluted earnings per share for the three months ended March 31, 2018 increased $0.01. The effect of the revision on our consolidated statement of operations for the three months ended June 30, 2018 was to reduce product net sales by $949,000, increase services net sales by $4,900,000, reduce product cost of goods sold by $532,000 and increase services cost of goods sold by $4,483,000. The effect of the revision on our consolidated statement of operations for the six months ended June 30, 2018 was to reduce product net sales by $25,313,000, increase services net sales by $8,853,000, reduce product cost of goods sold by $24,281,000 and increase services cost of goods sold by $7,563,000. For the three months ended June 30, 2018, there was no impact to gross profit, earnings from operations or net earnings resulting from the revision. For the six months ended June 30, 2018, gross profit, earnings from operations and net earnings increased by $258,000. There was no impact to diluted earnings per share in either the three or six months ended June 30, 2018. These revisions are appropriately reflected in the consolidated statement of operations for the year ended December 31, 2018. There is no impact to the audited consolidated financial statements for 2017, 2016 or any other prior period.

Operations and Summary of Sig_2

Operations and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Description of Business	Description of Business We empower organizations of all sizes with Intelligent Technology Solutions TM Operating Segment Geography North America United States and Canada EMEA Europe, Middle East and Africa APAC Asia-Pacific Our offerings in North America and certain countries in EMEA and APAC include hardware, software and services. Our offerings in the remainder of our EMEA and APAC segments are largely software and certain software-related services.
Principles of Consolidation and Presentation	Principles of Consolidation and Presentation The consolidated financial statements include the accounts of Insight Enterprises, Inc. and its wholly owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. References to “the Company,” “Insight,” “we,” “us,” “our” and other similar words refer to Insight Enterprises, Inc. and its consolidated subsidiaries, unless the context suggests otherwise.
Business Combinations	Business Combinations The Company accounts for all business combinations using the acquisition method of accounting, which allocates the fair value of the purchase consideration to the tangible and intangible assets acquired and liabilities assumed based on their estimated fair values. The excess of the purchase consideration over the fair values of these identifiable assets and liabilities is recorded as goodwill. When determining the fair values of assets acquired and liabilities assumed, management makes estimates and assumptions. Initial purchase price allocations are subject to revision within the measurement period, not to exceed one year from the date of acquisition. Acquisition-related expenses and transaction costs associated with business combinations are expensed as incurred.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements. Additionally, these estimates and assumptions affect the reported amounts of net sales and expenses during the reporting period. Actual results could differ from those estimates. On an ongoing basis, we evaluate our estimates, including those related to sales recognition, anticipated achievement levels under partner funding programs, assumptions related to stock-based compensation valuation, allowances for doubtful accounts, valuation of inventories, litigation-related obligations, valuation allowances for deferred tax assets and impairment of long-lived assets, including purchased intangibles and goodwill, if indicators of potential impairment exist.
Cash, Cash Equivalents and Restricted Cash	Cash, Cash Equivalents and Restricted Cash We consider all highly liquid investments with maturities at the date of purchase of three months or less to be cash equivalents. Book overdrafts represent the amount by which outstanding checks issued, but not yet presented to our banks for disbursement, exceed balances on deposit in applicable bank accounts and a legal right of offset with our positive cash balances in other financial institution accounts does not exist. Our book overdrafts, which are not directly linked to a credit facility or other bank overdraft arrangement, do not result in an actual bank financing, but rather constitute normal unpaid trade payables at the end of a reporting period. These amounts are included within our accounts payable balance in our consolidated balance sheets. The changes in these book overdrafts are included within the changes in accounts payable line item as a component of cash flows from operating activities in our consolidated statements of cash flows. Restricted cash generally includes any cash that is restricted as to withdrawal or usage. These amounts are included with cash and cash equivalents on the consolidated statement of cash flows. All cash receipts/payments with third parties directly to/from restricted cash accounts are reported as an operating, investing or financing cash flow, based on the nature of the transaction.
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts We establish an allowance for doubtful accounts to reflect our best estimate of probable losses inherent in our accounts receivable balance. The allowance is based on our evaluation of the aging of the receivables, historical write-offs and the current economic environment. We write off individual accounts against the reserve when we no longer believe that it is probable that we will collect the receivable because we become aware of a client’s or partner’s inability to meet its financial obligations. Such awareness may be as a result of bankruptcy filings, or deterioration in the client’s or partner’s operating results or financial position.
Inventories	Inventories We state inventories, principally purchased IT hardware, at the lower of weighted average cost (which approximates cost under the first-in, first-out method) or net realizable value. We evaluate inventories for excess, obsolescence or other factors that may render inventories unmarketable at normal margins. Write-downs are recorded so that inventories reflect the approximate net realizable value and take into account contractual provisions with our partners governing price protection, stock rotation and return privileges relating to obsolescence. Because of the large number of transactions and the complexity of managing the price protection and stock rotation process, estimates are made regarding write-downs of the carrying amount of inventories. Additionally, assumptions about future demand, market conditions and decisions by manufacturers/publishers to discontinue certain products or product lines can affect our decision to write down inventories. Inventories not available for sale relate to product sales transactions in which we are warehousing the product and will be deploying the product to our clients’ designated locations subsequent to period-end. Additionally, we may perform services on a portion of the product prior to shipment to our clients and will be paid a fee for doing so. Although these product contracts are non-cancelable with customary credit terms beginning the date the inventories are segregated in our warehouse and invoiced to the client and the warranty periods begin on the date of invoice under previous accounting guidance, prior to Topic 606, these transactions did not meet the sales recognition criteria under GAAP. Therefore, we did not record sales and the inventories were classified as inventories not available for sale on our consolidated balance sheet until the product was delivered. If clients remitted payment before we delivered the product to them, then we recorded the payments received as deferred revenue on our consolidated balance sheet until such time as the product was delivered. For additional information about our accounting policy related to these transactions after adopting Topic 606, see the Bill and Hold Transactions Sales Recognition
Property and Equipment	Property and Equipment We record property and equipment at cost. We capitalize major improvements and betterments, while maintenance, repairs and minor replacements are expensed as incurred. Depreciation or amortization is provided using the straight-line method over the following estimated economic lives of the assets: Estimated Economic Life Leasehold improvements Shorter of underlying lease term or asset life Furniture and fixtures 2 – 7 years Equipment 3 – 5 years Software 3 – 10 years Buildings 29 years Costs incurred to develop internal-use software during the application development stage, including capitalized interest, are recorded in property and equipment at cost. External direct costs of materials and services consumed in developing or obtaining internal-use computer software and payroll and payroll-related costs for teammates who are directly associated with and who devote time to internal-use computer software development projects, to the extent of the time spent directly on the project and specific to application development, are capitalized. Reviews are regularly performed to determine whether facts and circumstances exist which indicate that the economic life is shorter than originally estimated or the carrying amount of assets may not be recoverable. When an indication exists that the carrying amount of long-lived assets may not be recoverable, we assess the recoverability of our assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their remaining lives against their respective carrying amounts. Such impairment test is based on the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. Impairment, if any, is based on the excess of the carrying amount over the estimated fair value of those assets.
Goodwill	Goodwill Goodwill is recorded when the purchase price paid for an acquisition exceeds the estimated fair value of net identified tangible and intangible assets acquired. Goodwill is tested for impairment at the reporting unit level on an annual basis in the fourth quarter and between annual tests if an event occurs or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying value. The Company has three reporting units, which are the same as our operating segments. Multiple valuation techniques would likely be used to assess the fair value of the reporting unit. These techniques include the use of estimates and assumptions that are inherently uncertain. Changes in these estimates and assumptions could materially affect the determination of fair value or goodwill impairment, or both.
Intangible Assets	Intangible Assets We amortize finite lived intangible assets acquired in business combinations using the straight-line method over the estimated economic lives of the intangible assets from the date of acquisition. We regularly perform reviews to determine if facts and circumstances exist which indicate that the economic lives of our intangible assets are shorter than originally estimated or the carrying amount of these assets may not be recoverable. When an indication exists that the carrying amount of intangible assets may not be recoverable, we assess the recoverability of our assets by comparing the projected undiscounted net cash flows associated with the related asset or group of assets over their remaining lives against their respective carrying amounts. Such impairment test is based on the lowest level for which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. Impairment, if any, is based on the excess of the carrying amount over the estimated fair value of those assets.
Self Insurance	Self-Insurance We are self-insured in the United States for medical insurance up to certain annual stop-loss limits and workers’ compensation claims up to certain deductible limits. We establish reserves for claims, both reported and incurred but not reported, using currently available information as well as our historical claims experience.
Treasury Stock	Treasury Stock We record repurchases of our common stock as treasury stock at cost. We also record the subsequent retirement of these treasury shares at cost. The excess of the cost of the shares retired over their par value is allocated between additional paid-in capital and retained earnings. The amount recorded as a reduction of paid-in capital is based on the excess of the average original issue price of the shares over par value. The remaining amount is recorded as a reduction of retained earnings.
Sales Recognition	Sales Recognition We adopted ASU No. 2014-09, “Revenue from Contracts with Customers,” which created FASB Topic 606 (“Topic 606”) with a date of initial application of January 1, 2018. As a result, we changed our accounting policy for sales recognition as detailed below. Revenue is measured based on the consideration specified in a contract with a client, and excludes any sales incentives and amounts collected on behalf of third parties. The Company recognizes revenue when it satisfies a performance obligation by transferring control of a product or service to a client. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a client, are excluded from revenue. This is consistent with our accounting treatment prior to the adoption of Topic 606, whereby we We record the freight we bill to our clients as product net sales and the related freight costs we pay as product costs of goods sold. This is consistent with our accounting treatment prior to the adoption of Topic 606 . Nature of Goods and Services We sell hardware and software products on both a stand-alone basis without any services and as solutions bundled with services. When we provide a combination of hardware and software products with the provision of services, we separately identify our performance obligations under our contract with the client as the distinct goods (hardware and/or software products) or services that will be provided. The total transaction price for an arrangement with multiple performance obligations is allocated at contract inception to each distinct performance obligation in proportion to its stand-alone selling price. The stand-alone selling price is the price at which we would sell a promised good or service separately to a client. We estimate the price based on observable inputs, including direct labor hours and allocable costs, or use observable stand-alone prices when they are available. Product Offerings Hardware We recognize hardware product revenue at the point in time when a client takes control of the hardware, which typically occurs when title and risk of loss have passed to the client at its destination. Our selling terms and conditions were modified during the fourth quarter of 2017 to specify F.O.B. destination contractual terms such that control is transferred from the Company at the point in time when the product is received by the client. Prior to the adoption of Topic 606, because we either (i) had a general practice of covering client losses while products were in transit despite title and risk of loss contractually transferring at the point of shipment or (ii) had specifically stated F.O.B. destination contractual terms with the client, delivery was not deemed to have occurred until the point in time when the product was received by the client. The transaction price for hardware sales is adjusted for estimated product returns that we expect to occur under our return policy based upon historical return rates. We leverage drop-shipment arrangements with many of our partners and suppliers to deliver products to our clients without having to physically hold the inventory at our warehouses, thereby increasing efficiency and reducing costs. We recognize revenue for drop-shipment arrangements on a gross basis as the principal in the transaction when the product is received by the client because we control the product prior to transfer to the client. We also assume primary responsibility for fulfillment in the arrangement, we assume inventory risk if the product is returned by the client, we set the price of the product charged to the client and we work closely with our clients to determine their hardware specifications. This is consistent with our accounting treatment prior to the adoption of Topic 606. Bill and Hold Transactions We offer a service to our customers whereby clients may purchase product that we procure on their behalf and, at our clients’ direction, store the product in our warehouse for a designated period of time, with the intention of deploying the product to the clients’ designated locations at a later date. These warehousing services are designed to help our clients with inventory management challenges associated with technology roll-outs, product that is moving to end of life, and/or clients needing integrated stock available for immediate deployment. In some circumstances, we may also perform lab integration services on a portion of the product prior to shipment to our clients for a separate fee. The client is invoiced and title transfers to the client upon receipt of the product at our warehouse. These product contracts are non-cancelable with customary credit terms beginning the date the product is received in our warehouse and the warranty periods begin on the date of invoice. Revenue is recognized for the sale of the product to the client upon receipt of the product at our warehouse. The warehousing services and lab integration fees are considered separate performance obligations. Under previous accounting guidance, prior to the adoption of Topic 606, it was determined that these product sales transactions did not meet the revenue recognition criteria under GAAP. Therefore, we did not record product net sales, and the inventories were classified as inventories not available for sale on our consolidated balance sheets, until the product was delivered to the clients’ designated location. If clients remitted payment before we delivered the product to them, we recorded the payments received as deferred revenue on our consolidated balance sheets until such time as the product was delivered. Software We recognize revenue from software sales at the point in time when the client acquires the right to use or copy software under license and control transfers to the client. For renewals, revenue is recognized upon the commencement of the term of the software license agreement or when the renewal term begins, as applicable. This is a change from our accounting treatment prior to the adoption of Topic 606, whereby revenue from renewals of software licenses was recognized when the parties agreed to the renewal or extension, provided that all other revenue recognition criteria had been met. Although the revenue recognition treatment for term software license renewals has changed as described above, a substantial portion of the software licenses we sell are perpetual software licenses and do not require renewal or extension after their initial purchase by the client. Such perpetual licenses are periodically subject to true-up, whereby additional perpetual licenses are sold under the client’s pre-existing master agreement. Such true-ups are generally sold in arrears, and clients are invoiced for the additional licenses they had already been utilizing. Since the client controlled these additional perpetual licenses prior to the true-up, software revenue related to the underlying additional licenses is recognized when we agree to the true-up with our client and the partner. This is consistent with our accounting treatment prior to the adoption of Topic 606. For sales transactions for certain security software products that are sold with integral third-party delivered software maintenance, we changed our accounting to record the software license on a net basis, as the agent in the arrangement, given the predominant nature of the goods and services provided to the customer. This is a change from our accounting treatment prior to the adoption of Topic 606, whereby Services Offerings Software Maintenance Software maintenance agreements provide our clients with the right to obtain any software upgrades, bug fixes and help desk and other support services directly from the software publisher at no additional charge during the term of the software maintenance agreements. We act as the software publisher’s agent in selling these software maintenance agreements and do not assume any performance obligation to the client under the agreements. As a result, we are the agent in these transactions and these sales are recorded on a net sales recognition basis. Under net sales recognition, the cost of the software maintenance agreement is recorded as a reduction to sales, resulting in net sales equal to the gross profit on the transaction, and there are no costs of goods sold. Because we are acting as the software publisher’s agent, revenue is recognized when the parties agree to the initial purchase, renewal or extension as our agency services are then complete. Cloud / Software-as-a-Service Offerings Cloud or software-as-a-service subscription products provide our clients with access to software products hosted in the public cloud without the client taking possession of the software. We act as the software publisher’s agent in selling these software-as-a service subscription products and do not host the software products on our servers. We do not take control of the software products or assume any performance obligations to the clients related to the provisioning of the offerings in the cloud. As a result, these sales are recorded on a net sales recognition basis. This is consistent with our accounting treatment prior to the adoption of Topic 606. We report all fees earned from activities reported net within our services net sales category in our consolidated statements of operations. Insight Delivered Services We design, procure, deploy, implement and manage solutions that combine hardware, software and services to help businesses run smarter. Such services are provided by us or third-party sub-contract vendors as part of bundled arrangements, or are provided separately on a stand-alone basis as technical, consulting or managed services engagements. If the services are provided as part of a bundled arrangement with hardware and software, the hardware, software and services are generally distinct performance obligations. In general, we recognize revenue from services engagements as we perform the underlying services and satisfy our performance obligations. We recognize revenue from sales of services by measuring progress toward complete satisfaction of the related service performance obligation. Billings for such services that are made in advance of the related revenue recognized are recorded as a contract liability. Specific revenue recognition practices for certain of our services offerings are described in further detail below. Time and Materials Services Contracts We recognize revenue for professional services engagements that are on a time and materials basis based upon hours incurred for the performance completed to date for which we have the right to consideration, even if such amounts have not yet been invoiced as of period end. This is consistent with our accounting treatment prior to the adoption of Topic 606. Fixed Fee Services Contracts We recognize revenue on fixed fee professional services contracts using a proportional performance method of revenue recognition based on the ratio of direct labor and other allocated costs incurred to total estimated direct labor and other allocated costs. This is consistent with our accounting treatment prior to the adoption of Topic 606. OneCall Support Services Contracts When we sell certain hardware and/or software products to our clients, we also enter into service contracts with them. These contracts are support service agreements for the hardware and/or software products that were purchased from us. Under certain support services contracts, although we purchase third-party support contracts for maintenance on the specific hardware or software products we have sold, our internal support desk assists the client first by performing an initial technical triage to determine the source of the problem and whether we can direct the client on how to fix the problem. We refer to these services as “OneCall.” We act as the principal in the transaction because we perform the OneCall services over the term of the support service contract and we set the price of the service charged to the client As a result, we recognize revenue . This On our consolidated balance sheet, a significant portion of our contract liabilities balance relates to OneCall support services agreements for which clients have paid or have been invoiced but for which we have not yet recognized the applicable services revenue. We also defer incremental direct costs to fulfill our service contracts that we prepay to third parties for direct support of our fulfillment of the service contract to our clients under our contract terms and amortize them into operations over the term of the contracts. Vendor Direct Support Services Contracts When we do not provide OneCall services to the client on hardware and/or software products that were purchased, the client may purchase a vendor direct support services contract through us. Under these contracts, our clients call the manufacturer/publisher or its designated service organization directly for both the initial technical triage and any follow-up assistance. We act as the manufacturer/publisher’s agent in selling these support service contracts and do not assume any performance obligation to the client under the arrangements. As a result, these sales are recorded on a net sales recognition basis similar to software maintenance agreements, as discussed above. Because we are acting as the manufacturer/publisher’s agent, revenue is recognized when the parties agree to the purchase of the support services contract as our agency services are then complete. This is consistent with our accounting treatment prior to the adoption of Topic 606. Third-party Provided Services A majority of our third-party sub-contractor services contracts are entered into in conjunction with other services contracts under which the services are performed by Insight teammates. We have concluded that we control all services under the contract and can direct the third-party sub-contractor to provide the requested services. As such, we act as the principal in the transaction and record the services under a gross sales recognition basis, with the selling price being recorded in sales and our cost to the third-party service provider being recorded in costs of goods sold. For certain third-party service contracts in which we are not responsible for fulfillment of the services, we have concluded that we are an agent in the transaction and record revenue on a net sales recognition basis. This is consistent with our accounting treatment prior to the adoption of Topic 606.
Costs of Goods Sold	Costs of Goods Sold Costs of goods sold include product costs, direct costs incurred associated with delivering services, outbound and inbound freight costs and provisions for inventory reserves. These costs are reduced by provisions for supplier discounts and certain payments and credits received from partners, as described under “Partner Funding” below.
Selling and Administrative Expenses	Selling and Administrative Expenses Selling and administrative expenses include salaries and wages for teammates who are not directly associated with delivering services, bonuses and incentives, stock-based compensation expense, employee-related expenses, facility-related expenses, marketing and advertising expense, reduced by certain payments and credits received from partners related to shared marketing expense programs, as described under “Partner Funding” below, depreciation of property and equipment, professional fees, amortization of intangible assets, provisions for losses on accounts receivable and other operating expenses.
Partner Funding	Partner Funding We receive payments and credits from partners, including consideration pursuant to volume sales incentive programs, volume purchase incentive programs and shared marketing expense programs. Partner funding received pursuant to volume sales incentive programs is recognized as it is earned as a reduction to costs of goods sold. Partner funding received pursuant to volume purchase incentive programs is allocated as a reduction to inventories based on the applicable incentives earned from each partner and is recorded in cost of goods sold as the related inventory is sold. Partner funding received pursuant to shared marketing expense programs is recorded as it is earned as a reduction of the related selling and administrative expenses in the period the program takes place if the consideration represents a reimbursement of specific, incremental, identifiable costs. Consideration that exceeds the specific, incremental, identifiable costs is classified as a reduction of costs of goods sold. The amount of partner funding recorded as a reduction of selling and administrative expenses in our statements of operations totaled $68,571,000, $53,227,000 and $48,114,000 in 2018, 2017 and 2016, respectively.
Concentrations of Risk	Concentrations of Risk Credit Risk Although we are affected by the international economic climate, management does not believe material credit risk concentration existed at December 31, 2018. We monitor our clients’ financial condition and do not require collateral. No single client accounted for more than 4% of our consolidated net sales in 2018. Supplier Risk Purchases from Microsoft accounted for approximately 26% of our aggregate purchases in 2018. No other partner accounted for more than 10% of purchases in 2018. Our top five partners as a group for 2018 were Microsoft, Cisco Systems, Tech Data (a distributor), HP Inc. and Ingram Micro (a distributor), and approximately 60% of our total purchases during 2018 came from this group of partners. Although brand names and individual products are important to our business, we believe that competitive sources of supply are available in substantially all of our product categories such that, with the exception of Microsoft, we are not dependent on any single partner for sourcing products.
Advertising Costs	Advertising Costs Advertising costs are expensed as they are incurred. Advertising expense of $ 57,448
Stock-Based Compensation	Stock-Based Compensation Stock-based compensation is measured based on the fair value of the award on the date of grant and the corresponding expense is recognized over the period during which an employee is required to provide service in exchange for the reward. Stock-based compensation expense is classified in the same line item of our consolidated statements of operations as other payroll-related expenses specific to the employee. Compensation expense related to service-based restricted stock units (“RSUs”) is recognized on a straight-line basis over the requisite service period for the entire award. Compensation expense related to performance-based RSUs is recognized on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award was, in-substance, multiple awards (i.e., a graded vesting basis). Forfeitures are recognized as they occur.
Foreign Currencies	Foreign Currencies We use the U.S. dollar as our reporting currency. The functional currencies of our foreign subsidiaries are the local currencies. Accordingly, assets and liabilities of the subsidiaries are translated into U.S. dollars at the exchange rate in effect at the balance sheet dates. Income and expense items are translated at the average exchange rate for each month within the year. The resulting translation adjustments are recorded directly in accumulated other comprehensive income, net of tax – foreign currency translation adjustments as a separate component of stockholders’ equity. Net foreign currency transaction gains/losses, including transaction gains/losses on intercompany balances that are not of a long-term investment nature and non-functional currency cash balances, are reported as a separate component of non-operating (income) expense in our consolidated statements of operations.
Derivative Financial Instruments	Derivative Financial Instruments We enter into forward foreign exchange contracts to mitigate the risk of non-functional currency monetary assets and liabilities on our consolidated financial statements. These forward contracts are not designated as hedge instruments. The fair value of all derivative assets and liabilities are recorded gross in the other current assets and accrued expenses and other current liabilities sections of our consolidated balance sheets. Gains/losses are recorded net in non-operating (income) expense in our consolidated statements of operations.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carry forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable earnings in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in earnings in the period that includes the enactment date. We recognize net deferred tax assets to the extent that we believe these assets are more likely than not to be realized. In making such a determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax-planning strategies and results of recent operations. If we determine that we would be able to realize our deferred tax assets in the future in excess of their net recorded amount, we would make an adjustment to the deferred tax asset valuation allowance, which would reduce the provision for income taxes. We record uncertain tax positions on the basis of a two-step process whereby (1) we determine whether it is more likely than not that the tax positions will be sustained on the basis of the technical merits of the position and (2) for those tax positions that meet the more-likely-than-not recognition threshold, we recognize the largest amount of tax benefit that is more than 50 percent likely to be realized upon ultimate settlement with the related tax authority. Interest and penalties related to unrecognized tax benefits are recognized within the income tax expense line in our consolidated statements of operations. Accrued interest and penalties are included within the related tax liability line in our consolidated balance sheets.
Net Earnings Per Share ("EPS")	Net Earnings Per Share (“EPS”) Basic EPS is computed by dividing net earnings available to common stockholders by the weighted average number of common shares outstanding during each year. Diluted EPS is computed on the basis of the weighted average number of shares of common stock plus the effect of dilutive potential common shares outstanding during the period using the treasury stock method. Dilutive potential common shares include outstanding RSUs. A reconciliation of the denominators of the basic and diluted EPS calculations follows (in thousands, except per share data): Years Ended December 31, 2018 2017 2016 Numerator: Net earnings $ 163,677 $ 90,683 $ 84,690 Denominator: Weighted-average shares used to compute basic EPS 35,586 35,741 36,102 Dilutive potential common shares due to dilutive RSUs, net of tax effect 423 466 336 Weighted-average shares used to compute diluted EPS 36,009 36,207 36,438 Net earnings per share: Basic $ 4.60 $ 2.54 $ 2.35 Diluted $ 4.55 $ 2.50 $ 2.32 In 2018, 2017 and 2016, approximately 17,000, 40,000 and 36,000, respectively, of our RSUs were not included in the diluted EPS calculations because their inclusion would have been anti-dilutive. These share-based awards could be dilutive in the future.
Recently Issued Accounting Standards	Recently Issued Accounting Standards In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standard Update (“ASU”) No. 2018-15, “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract.” The new standard requires that implementation costs incurred by customers in cloud computing arrangements are deferred if they would be capitalized by customers in software licensing arrangements under the internal-use software guidance. The new standard is effective for interim and annual periods beginning after December 15, 2019, and early adoption is permitted. We adopted this new standard in the fourth quarter of 2018 and applied it retrospectively. The adoption of this standard did not have a material effect on our consolidated financial statements. In July 2018, the FASB issued ASU No. 2018-09, “Codification Improvements,” which clarifies and corrects unintended application of guidance and makes improvement to Codification Topics. There are various effective dates beginning with the ASU release date. We adopted the standard in 2018. The standard did not have a material effect on our consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-01, “Business Combinations (Topic 805): Clarifying the Definition of a Business.” The new standard provides a new framework for determining whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. The new standard is effective for interim and annual periods beginning after December 15, 2017, and early adoption is permitted. We adopted the standard in the first quarter of 2018. The standard did not have a material effect on our consolidated financial statements. In November 2016, the FASB issued ASU No. 2016-18, “Restricted Cash.” The new standard requires companies to include cash and cash equivalents that have restrictions on withdrawal or use within total cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The new standard is effective for interim and annual periods beginning after December 15, 2017, and early adoption is permitted. The new standard is required to be adopted retrospectively. We adopted the standard in the first quarter of 2018. The standard did not have a material effect on our consolidated financial statements. As a result of the adoption of ASU No. 2016-18, we began including amounts generally described as restricted cash or restricted cash equivalents with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown in the statement of cash flows for the twelve months ended December 31, 2018. Amounts shown in the consolidated statements of cash flows for the twelve months ended December 31, 2017 and 2016 were reclassified to conform to the current period presentation. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the balance sheets that sum to the total of the same such amounts shown in the statements of cash flows for the years ended December 31, 2018, 2017 and 2016 (in thousands): December 31, 2018 December 31, 2017 December 31, 2016 Cash and cash equivalents $ 142,655 $ 105,831 $ 202,882 Restricted cash included in other current assets 8 46 51 Restricted cash included in other non-current assets 1,630 1,568 3,013 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 144,293 $ 107,445 $ 205,946 Amounts included in restricted cash represent those required to be set aside by a contractual agreement with a lessor related to certain leased office space in foreign jurisdictions. Restricted cash shown in the statement of cash flows for the year ended December 31, 2017 also includes funds deposited with a financial institution in Australia to provide a guarantee on our behalf as security for any funds we might draw under our revolving loan facility in China. The deposited funds were restricted in that we could not withdraw them as long as the related loan facility was in place. These amounts were reported in other non-current assets. In August 2016, the FASB issued ASU No. 2016-15, “Classification of Certain Cash Receipts and Cash Payments.” The new standard is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. It addresses eight specific cash flow issues to clarify the presentation and classification of cash receipts and cash payments in the statement of cash flows. The new standard is effective for interim and annual periods beginning after December 15, 2017, and early adoption is permitted. The new standard is required to be adopted retrospectively. We adopted the new standard in the first quarter of 2018. The standard did not have a material effect on our consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, “Leases,” which supersedes the existing lease recognition requirements in the current accounting standard for leases. The core principal of the new standard is that an entity should recognize right-of-use (“ROU”) assets and lease liabilities arising from a lease for both financing and operating leases, along with additional qualitative and quantitative disclosures. The new standard is to be applied using a modified retrospective transition method with the option to elect a number of practical expedients. The new standard will be effective for fiscal years beginning after December 15, 2018, including interim periods within such fiscal years. In July 2018, the FASB issued ASU No. 2018-11, “Leases (Topic 842) – Targeted Improvements.” ASU 2018-11 provides additional guidance to Topic 842 including providing preparers an additional optional retrospective adoption method which allows entities to initially apply the new leases standard at the adoption date and recognize a cumulative effect adjustment to the opening balance of retained earnings. ASU 2018-11 also provides lessors a practical expedient to not separate lease from non-lease components, in certain situations. We will adopt the new lease standard as of January 1, 2019 and plan to utilize the retrospective cumulative effect adjustment transition method with a cumulative effect adjustment being recorded as of the adoption date. We expect to elect certain available practical expedients including the package of practical expedients permitted under the transition guidance within the new standard, which among other things, will allow us to carry forward the historical lease classification. Additionally, we will make an accounting policy election to not record ROU assets and lease liabilities for leases with an initial term of twelve months or less on our consolidated balance sheet. We have established a cross-functional implementation team and are in the process of finalizing the scope of arrangements that will be subject to this standard as well as assessing the impact to our systems, processes, and internal controls over financial reporting. While we are still evaluating the impact of adopting ASU No. 2016-02, we anticipate this standard will have a material impact on our other assets and other liabilities balances. The primary impact will be to record ROU assets and lease liabilities for existing operating leases on our consolidated balance sheets. Currently, we estimate adoption of the standard will result in recognition of additional ROU assets and lease liabilities of between approximately $70 million and $80 million, each, as of January 1, 2019. We do not expect the adoption to have a material impact on our consolidated statements of operations or our consolidated statements of cash flows. We do not believe the standard will have a notable impact on our liquidity. The standard will have no impact on our debt-covenant compliance under our current agreements. Our analysis and evaluation of the new standard will continue through its effective date in the first quarter of 2019, including continuing to monitor any potential changes in the standard proposed by the FASB. In January 2016, the FASB issued ASU No. 2016-01, “Financial Instruments Overview: Recognition and Measurement of Financial Assets and Financial Liabilities.” The new standard amends the guidance on the classification and measurement of financial instruments and changes the accounting for investments in equity securities. The new standard is effective for annual and interim periods in fiscal years beginning after December 15, 2017, and early adoption is permitted. We adopted the standard in the first quarter of 2018. The standard did not have a material effect on our consolidated financial statements. On May 28, 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers,” which amends the existing accounting standards for revenue recognition. We adopted the standard in the first quarter of 2018. See Note 2 for further discussion.

Operations and Summary of Sig_3

Operations and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Estimated Economic Lives of Property and Equipment	We record property and equipment at cost. We capitalize major improvements and betterments, while maintenance, repairs and minor replacements are expensed as incurred. Depreciation or amortization is provided using the straight-line method over the following estimated economic lives of the assets: Estimated Economic Life Leasehold improvements Shorter of underlying lease term or asset life Furniture and fixtures 2 – 7 years Equipment 3 – 5 years Software 3 – 10 years Buildings 29 years
Reconciliation of Denominators of Basic and Diluted EPS Calculations	A reconciliation of the denominators of the basic and diluted EPS calculations follows (in thousands, except per share data): Years Ended December 31, 2018 2017 2016 Numerator: Net earnings $ 163,677 $ 90,683 $ 84,690 Denominator: Weighted-average shares used to compute basic EPS 35,586 35,741 36,102 Dilutive potential common shares due to dilutive RSUs, net of tax effect 423 466 336 Weighted-average shares used to compute diluted EPS 36,009 36,207 36,438 Net earnings per share: Basic $ 4.60 $ 2.54 $ 2.35 Diluted $ 4.55 $ 2.50 $ 2.32
Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash	The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the balance sheets that sum to the total of the same such amounts shown in the statements of cash flows for the years ended December 31, 2018, 2017 and 2016 (in thousands): December 31, 2018 December 31, 2017 December 31, 2016 Cash and cash equivalents $ 142,655 $ 105,831 $ 202,882 Restricted cash included in other current assets 8 46 51 Restricted cash included in other non-current assets 1,630 1,568 3,013 Total cash, cash equivalents and restricted cash shown in the statement of cash flows $ 144,293 $ 107,445 $ 205,946

New Accounting Standard - Sal_2

New Accounting Standard - Sales Recognition (Tables)	12 Months Ended
	Dec. 31, 2018
Summary of Revenue Disaggregated by Reportable Operating Segments	In the following table, revenue is disaggregated by our reportable operating segments, which are primarily defined by Year Ended December 31, 2018 North America EMEA APAC Consolidated Major Offerings Hardware $ 3,610,356 $ 653,499 $ 29,496 $ 4,293,351 Software 1,112,715 736,509 107,363 1,956,587 Services 639,910 140,233 50,055 830,198 $ 5,362,981 $ 1,530,241 $ 186,914 $ 7,080,136 Major Client Groups Large Enterprise / Corporate $ 3,951,900 $ 1,134,696 $ 49,826 $ 5,136,422 Public Sector 498,873 327,818 76,567 903,258 Small and Medium-Sized Businesses 912,208 67,727 60,521 1,040,456 $ 5,362,981 $ 1,530,241 $ 186,914 $ 7,080,136 Revenue Recognition based on acting as Principal or Agent in the Transaction Gross revenue recognition (Principal) $ 5,143,228 $ 1,439,979 $ 164,394 $ 6,747,601 Net revenue recognition (Agent) 219,753 90,262 22,520 332,535 $ 5,362,981 $ 1,530,241 $ 186,914 $ 7,080,136
Summary of Information about Receivables, Contract Assets and Contract Liabilities	The following table provides information about receivables, contract assets and contract liabilities as of December 31, 2018 and January 1, 2018 (in thousands): December 31, January 1, 2018 2018 Current receivables, which are included in “Accounts receivable, net” $ 1,931,736 $ 1,909,074 Non-current receivables, which are included in “Other assets” 38,157 32,227 Contract assets, which are included in “Other current assets” 892 595 Contract liabilities, which are included in “Deferred revenue” and “Other liabilities” 82,117 86,743
Summary of Changes in Contract Assets and Contract Liabilities from Contract with Customers	Significant changes in the contract assets and the contract liabilities balances during the year ended December 31, 2018 are as follows (in thousands): Increase (Decrease) Contract Contract Assets Liabilities Balances at January 1, 2018 $ 595 $ 86,743 Reclassification of the beginning contract liabilities to revenue, as the result of performance obligations satisfied — (72,779 ) Cash received in advance and not recognized as revenue — 68,153 Reclassification of the beginning contract assets to receivables, as the result of rights to consideration becoming unconditional (595 ) — Contract assets recognized, net of reclassification to receivables 892 — Balances at December 31, 2018 $ 892 $ 82,117
Summary of Estimated Net Sales Related to Performance Obligation	The following table includes estimated net sales related to performance obligations that are unsatisfied (or partially unsatisfied) as of December 31, 2018 that are expected to be recognized in the future (in thousands): Products Services Total 2019 13 88,998 89,011 2020 5 28,906 28,911 2021 — 11,251 11,251 2022 — 4,413 4,413 2023 — 1,841 1,841 2024 and thereafter — 376 376 Total remaining performance obligations $ 18 $ 135,785 $ 135,803
Accounting Standards Update 2014-09 [Member]
Summary of Impact of Adoption of Topic 606 On Financial Statements	BALANCE SHEET AT DECEMBER 31, 2018 Pre-Topic 606 As Reported Adjustments Adoption Cash and cash equivalents $ 142,655 $ — $ 142,655 Accounts receivable, net 1,931,736 (145,184 ) 1,786,552 Inventories 148,503 — 148,503 Inventories not available for sale — 118,936 118,936 Other current assets 115,683 39,684 155,367 Total current assets 2,338,577 13,436 2,352,013 Property and equipment, net 72,954 — 72,954 Goodwill 166,841 — 166,841 Intangible assets, net 112,179 — 112,179 Deferred income taxes 7,967 — 7,967 Other assets 77,429 (13,762 ) 63,667 $ 2,775,947 $ (326 ) $ 2,775,621 Accounts payable – trade $ 978,104 $ (84,504 ) $ 893,600 Accounts payable – inventory financing facility 304,130 — 304,130 Accrued expenses and other current liabilities 190,733 (16,557 ) 174,176 Current portion of long-term debt 1,395 — 1,395 Deferred revenue 62,300 121,526 183,826 Total current liabilities 1,536,662 20,465 1,557,127 Long-term debt 195,525 — 195,525 Deferred income taxes 683 — 683 Other liabilities 56,088 (11,443 ) 44,645 1,788,958 9,022 1,797,980 Stockholders’ equity: Preferred stock — — — Common stock 355 — 355 Additional paid-in capital 323,622 — 323,622 Retained earnings 704,665 (9,311 ) 695,354 Accumulated other comprehensive loss – foreign currency translation adjustments (41,653 ) (37 ) (41,690 ) Total stockholders’ equity 986,989 (9,348 ) 977,641 $ 2,775,947 $ (326 ) $ 2,775,621 STATEMENT OF OPERATIONS FOR TH E YEAR ENDED DECEMBER 31, 2018 Pre-Topic 606 As Reported Adjustments Adoption Net sales: Products $ 6,249,938 $ 49,497 $ 6,299,435 Services 830,198 (11,675 ) 818,523 Total net sales 7,080,136 37,822 7,117,958 Costs of goods sold: Products 5,711,400 39,616 5,751,016 Services 375,018 479 375,497 Total costs of goods sold 6,086,418 40,095 6,126,513 Gross profit 993,718 (2,273 ) 991,445 Operating expenses: Selling and administrative expenses 756,529 373 756,902 Severance and restructuring expenses 3,424 — 3,424 Acquisition-related expenses 282 — 282 Earnings from operations 233,483 (2,646 ) 230,837 Non-operating expense, net 21,581 8 21,589 Earnings before income taxes 211,902 (2,654 ) 209,248 Income tax expense 48,225 (519 ) 47,706 Net earnings $ 163,677 $ (2,135 ) $ 161,542 Net earnings per share: Basic $ 4.60 $ (0.06 ) $ 4.54 Diluted $ 4.55 $ (0.06 ) $ 4.49 Shares used in per share calculations: Basic 35,586 — 35,586 Diluted 36,009 — 36,009

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Property and Equipment	Property and equipment consist of the following (in thousands): December 31, 2018 2017 Software $ 170,327 $ 171,701 Buildings 64,263 65,468 Equipment 100,421 103,542 Furniture and fixtures 38,200 38,459 Leasehold improvements 26,319 25,981 Land 5,124 5,179 404,654 410,330 Accumulated depreciation and amortization (331,700 ) (335,078 ) Property and equipment, net $ 72,954 $ 75,252

Goodwill (Tables)

Goodwill (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill for the year ended December 31, 2018 are as follows (in thousands): North America EMEA APAC Consolidated Goodwill $ 379,110 $ 151,439 $ 20,930 $ 551,479 Accumulated impairment losses $ (323,422 ) $ (151,439 ) $ (13,973 ) $ (488,834 ) Goodwill acquired during 2017 64,140 4,041 605 68,786 Balance at December 31, 2017 119,828 4,041 7,562 131,431 Goodwill acquired during 2018 36,440 (108 ) — 36,332 Foreign currency translation adjustment — (184 ) (738 ) (922 ) Balance at December 31, 2018 $ 156,268 $ 3,749 $ 6,824 $ 166,841

Intangible Assets (Tables)

Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Intangible Assets, Net	Intangible assets consist of the following (in thousands): December 31, 2018 2017 Customer relationships $ 159,566 $ 133,660 Other 5,555 4,475 165,121 138,135 Accumulated amortization (52,942 ) (37,357 ) Intangible assets, net $ 112,179 $ 100,778
Future Amortization Expenses	Future amortization expense for the remaining unamortized balance as of December 31, 2018 is estimated as follows (in thousands): Years Ending December 31, Amortization Expense 2019 $ 14,602 2020 14,590 2021 14,429 2022 14,256 2023 13,831 Thereafter 40,471 Total amortization expense $ 112,179

Debt, Capital Lease and Other_2

Debt, Capital Lease and Other Financing Obligations (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Long-Term Debt	Our long-term debt consists of the following (in thousands): December 31, 2018 2017 Senior revolving credit facility $ — $ 117,500 Term Loan A (less unamortized debt issuance costs of $873 in 2017) — 165,377 Accounts receivable securitization financing facility 194,000 25,000 Capital leases and other financing obligations 2,920 5,291 Total 196,920 313,168 Less: current portion of long-term debt (1,395 ) (16,592 ) Long-term debt $ 195,525 $ 296,576
Schedule of Future Minimum Lease Payments for Capital Leases	Future minimum payments under the capitalized leases consist of the following as of December 31, 2018 (in thousands): Years Ending December 31, 2019 $ 1,488 2020 1,151 2021 432 Total minimum lease payments 3,071 Less amount representing interest (151 ) Present value of minimum lease payments $ 2,920

Operating Leases (Tables)

Operating Leases (Tables)	12 Months Ended
	Dec. 31, 2018
Leases [Abstract]
Future Minimum Lease Payments	Future minimum lease payments under non-cancelable operating leases (with initial or remaining lease terms in excess of one year) as of December 31, 2018 are as follows (in thousands): Years Ending December 31, 2019 $ 21,499 2020 15,580 2021 12,121 2022 9,150 2023 6,296 Thereafter 7,238 Total minimum lease payments $ 71,884

Severance and Restructuring A_2

Severance and Restructuring Activities (Tables)	12 Months Ended
	Dec. 31, 2018
Restructuring And Related Activities [Abstract]
Activity Related to Resource Actions and Outstanding Obligations	The following table details the activity for each of the three years in the period ending December 31, 2018 related to these resource actions, and the outstanding obligations as of December 31, 2018 (in thousands): North America EMEA APAC Consolidated Balances at December 31, 2015 505 2,983 — 3,488 Severance costs, net of adjustments 2,966 1,496 118 4,580 Cash payments (2,524 ) (3,239 ) (118 ) (5,881 ) Foreign currency translation adjustments — (23 ) — (23 ) Balances at December 31, 2016 947 1,217 — 2,164 Severance costs, net of adjustments 4,010 4,888 104 9,002 Cash payments (3,336 ) (3,597 ) (89 ) (7,022 ) Foreign currency translation adjustments 10 486 — 496 Balances at December 31, 2017 1,631 2,994 15 4,640 Severance costs, net of adjustments 1,617 1,677 130 3,424 Cash payments (2,003 ) (3,386 ) (145 ) (5,534 ) Foreign currency translation adjustments (41 ) (37 ) — (78 ) Balances at December 31, 2018 $ 1,204 $ 1,248 $ — $ 2,452

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Pre-tax Amounts by Operating Segment for Stock-Based Compensation	We recorded the following pre-tax amounts in selling and administrative expenses for stock-based compensation, by operating segment, in the accompanying consolidated financial statements (in thousands): Years Ended December 31, 2018 2017 2016 North America $ 11,697 $ 9,697 $ 8,096 EMEA 3,170 2,737 2,530 APAC 488 392 432 Total Consolidated $ 15,355 $ 12,826 $ 11,058
Summary of Restricted Stock Units Activity	The following table summarizes our RSU activity during 2018: Number Weighted Average Grant Date Fair Value Fair Value Nonvested at the beginning of year 892,113 $ 32.86 Granted 557,823 $ 36.79 Vested, including shares withheld to cover taxes (383,672 ) $ 29.80 $ 14,302,223 (a) Forfeited (45,334 ) $ 34.10 Nonvested at the end of year 1,020,930 $ 36.10 $ 41,602,898 (b) (f) The aggregate fair value of vested RSUs represents the total pre-tax fair value, based on the closing stock price on the day of vesting, which would have been received by holders of RSUs had all such holders sold their underlying shares on that date. The aggregate intrinsic value for RSUs which vested during 2017 and 2016 was $20,284,762 and $9,235,102, respectively. (g) The aggregate fair value of the nonvested RSUs and the RSUs expected to vest represents the total pre-tax fair value, based on our closing stock price of $40.75

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Earning Before IncomeTaxes and Related Income Tax Expenses	The following table presents the United States (“U.S.”) and foreign components of earnings before income taxes and the related income tax expense (in thousands): Years Ended December 31, 2018 2017 2016 Earnings before income taxes: United States $ 145,907 $ 119,330 $ 99,095 Foreign 65,995 39,768 40,363 $ 211,902 $ 159,098 $ 139,458 Income tax expense: Current: U.S. Federal $ 18,334 $ 31,067 $ 27,947 U.S. State and local 3,218 3,636 2,200 Foreign 17,547 14,573 14,104 39,099 49,276 44,251 Deferred: U.S. Federal 8,123 20,327 10,395 U.S. State and local 1,142 (427 ) 1,088 Foreign (139 ) (761 ) (966 ) 9,126 19,139 10,517 $ 48,225 $ 68,415 $ 54,768
Schedule Reconciles Difference Between U.S. Federal Income Taxes at U.S. Statutory Rate and Our Income Tax Expense	The following schedule reconciles the differences between the U.S. federal income taxes at the U.S. statutory rate and our income tax expense (dollars in thousands): 2018 2017 2016 Statutory federal income tax rate $ 44,499 21.0 % $ 55,684 35.0 % $ 48,810 35.0 % State income tax expense, net of federal income tax benefit 6,767 3.2 2,808 1.8 3,368 2.4 Audits and adjustments, net 2,659 1.3 (313 ) (0.2 ) (1,039 ) (0.7 ) Change in valuation allowances 60 — 2,472 1.5 3,742 2.7 Foreign income taxed at different rates 2,639 1.2 (6,057 ) (3.8 ) (6,611 ) (4.7 ) U.S. mandatory deemed repatriation (1,396 ) (0.7 ) 5,625 3.5 — — Adjustment of net deferred tax assets for enacted U.S. federal tax reform (4,198 ) (2.0 ) 7,738 4.9 — — Research and development credits (4,132 ) (1.9 ) — — — — Change in U.S. tax law applicable to certain foreign entities — — — — 2,577 1.8 Non-deductible compensation 1,399 0.7 571 0.4 518 0.4 Other, net (72 ) — (113 ) (0.1 ) 3,403 2.4 Effective tax rate $ 48,225 22.8 % $ 68,415 43.0 % $ 54,768 39.3 %
Significant Components of Deferred Tax Assets and Liabilities	The significant components of deferred tax assets and liabilities are as follows (in thousands): December 31, 2018 2017 Deferred tax assets: Net operating losses $ 23,926 $ 25,418 Foreign tax credits 16,800 21,346 Accruals 4,242 5,921 Stock-based compensation 3,173 3,023 Property and equipment 2,008 1,111 Accounts receivable 1,980 2,124 Goodwill and other intangibles 1,296 4,717 Deferred revenue 1,016 600 Inventories 133 1,930 Other 2,487 335 Gross deferred tax assets 57,061 66,525 Valuation allowances (40,630 ) (45,995 ) Total deferred tax assets 16,431 20,530 Deferred tax liabilities: Inventories (4,885 ) — Accrued withholding tax (1,303 ) (1,452 ) Goodwill and other intangibles (1,202 ) (1,587 ) Other (1,757 ) (1,144 ) Total deferred tax liabilities (9,147 ) (4,183 ) Net deferred tax assets $ 7,284 $ 16,347
Net Non-Current Deferred Tax Assets and Liabilities	The net non-current deferred tax assets and liabilities are as follows (in thousands): December 31, 2018 2017 Net non-current deferred tax assets $ 7,967 $ 17,064 Net non-current deferred tax liabilities (683 ) (717 ) Net deferred tax assets $ 7,284 $ 16,347
Change in Valuation Allowance	The following table summarizes the change in the valuation allowance (in thousands): December 31, 2018 2017 Valuation allowances at beginning of year $ 45,995 $ 30,972 Increase in income tax expense 60 2,472 U.S. federal tax reform (1,589 ) 11,623 Foreign currency translation adjustments (1,180 ) 2,865 Other (2,656 ) (1,937 ) Valuation allowances at end of year $ 40,630 $ 45,995
Reconciliation of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amounts of unrecognized tax benefits, excluding interest, is as follows (in thousands): Balance at December 31, 2017 $ 3,986 Additions for tax positions in prior periods 1,613 Additions for tax positions in current period 2,014 Subtractions due to foreign currency translation (8 ) Subtractions due to audit settlements and statute expirations (1,069 ) Balance at December 31, 2018 $ 6,536

Share Repurchase Programs (Tabl

Share Repurchase Programs (Tables)	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Summary of Shares of Common Stock Repurchased Under Repurchase Programs	The following table summarizes the shares of our common stock that we repurchased on the open market under these repurchase programs during the years ended December 31, 2018, 2017 and 2016, respectively, in thousands, except per share amounts: Year Total Number of Shares Purchased Average Price Paid per Share Approximate Dollar Value of Shares Purchased 2018 641 $ 34.42 $ 22,069 2017 — — — 2016 1,891 26.43 50,000 Total 2,532 $ 72,069

Supplemental Financial Inform_2

Supplemental Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Receivables [Abstract]
Summary of Additions and Deductions Related to Allowances for Doubtful Accounts	Additions and deductions related to the allowance for doubtful accounts receivable for 2018, 2017 and 2016 were as follows (in thousands): Balance at Beginning of Year Additions Deductions Balance at End of Year Allowance for doubtful accounts receivable: Year ended December 31, 2018 $ 10,158 $ 4,776 $ (4,472 ) $ 10,462 Year ended December 31, 2017 $ 9,138 $ 5,245 $ (4,225 ) $ 10,158 Year ended December 31, 2016 $ 11,872 $ 2,452 $ (5,186 ) $ 9,138

Cash Flows (Tables)

Cash Flows (Tables)	12 Months Ended
	Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Schedule of Cash Payments for Interest on Indebtedness and Cash Payments for Taxes on Income	Cash payments for interest on indebtedness and cash payments for taxes on income were as follows (in thousands): Years Ended December 31, 2018 2017 2016 Supplemental disclosures of cash flow information: Cash paid during the year for interest $ 10,155 $ 10,976 $ 3,782 Cash paid during the year for income taxes, net of refunds $ 31,218 $ 55,470 $ 39,051

Segment and Geographic Inform_2

Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2018
Segment Reporting [Abstract]
Net Sales by Offering for North America, EMEA and APAC	The following tables summarize net sales by offering for North America, EMEA and APAC by sales mix amounts (in thousands): North America Years Ended December 31, Sales Mix 2018 2017 2016 Hardware $ 3,610,356 $ 3,352,355 $ 2,454,889 Software 1,112,715 1,310,118 1,146,808 Services 639,910 519,261 370,131 $ 5,362,981 $ 5,181,734 $ 3,971,828 EMEA Years Ended December 31, Sales Mix 2018 2017 2016 Hardware $ 653,499 $ 536,500 $ 481,505 Software 736,509 710,452 762,427 Services 140,233 108,464 94,628 $ 1,530,241 $ 1,355,416 $ 1,338,560 APAC Years Ended December 31, Sales Mix 2018 2017 2016 Hardware $ 29,496 $ 27,907 $ 18,916 Software 107,363 101,412 132,718 Services 50,055 37,154 23,493 $ 186,914 $ 166,473 $ 175,127
Financial Information about Reportable Operating Segments	The tables below present information about our reportable operating segments (in thousands): Year Ended December 31, 2018 North America EMEA APAC Consolidated Net Sales: Products $ 4,723,071 $ 1,390,008 $ 136,859 $ 6,249,938 Services 639,910 140,233 50,055 830,198 Total net sales 5,362,981 1,530,241 186,914 7,080,136 Costs of goods sold: Products 4,313,070 1,273,422 124,908 5,711,400 Services 317,216 35,352 22,450 375,018 Total costs of goods sold 4,630,286 1,308,774 147,358 6,086,418 Gross profit 732,695 221,467 39,556 993,718 Operating expenses: Selling and administrative expenses 545,091 182,470 28,968 756,529 Severance and restructuring expenses 1,617 1,677 130 3,424 Acquisition-related expenses 282 — — 282 Earnings from operations $ 185,705 $ 37,320 $ 10,458 $ 233,483 Year Ended December 31, 2017 North America EMEA APAC Consolidated Net Sales: Products $ 4,662,473 $ 1,246,952 $ 129,319 $ 6,038,744 Services 519,261 108,464 37,154 664,879 Total net sales 5,181,734 1,355,416 166,473 6,703,623 Costs of goods sold: Products 4,253,587 1,140,204 118,611 5,512,402 Services 236,470 24,902 11,279 272,651 Total costs of goods sold 4,490,057 1,165,106 129,890 5,785,053 Gross profit 691,677 190,310 36,583 918,570 Operating expenses: Selling and administrative expenses 530,792 164,305 28,231 723,328 Severance and restructuring expenses 4,010 4,888 104 9,002 Loss on sale of foreign entity — 3,646 — 3,646 Acquisition-related expenses 3,223 106 — 3,329 Earnings from operations $ 153,652 $ 17,365 $ 8,248 $ 179,265 Year Ended December 31, 2016 North America EMEA APAC Consolidated Net Sales: Products $ 3,601,697 $ 1,243,932 $ 151,634 $ 4,997,263 Services 370,131 94,628 23,493 488,252 Total net sales 3,971,828 1,338,560 175,127 5,485,515 Costs of goods sold: Products 3,301,148 1,129,917 140,397 4,571,462 Services 145,199 22,956 2,796 170,951 Total costs of goods sold 3,446,347 1,152,873 143,193 4,742,413 Gross profit 525,481 185,687 31,934 743,102 Operating expenses: Selling and administrative expenses 401,316 160,269 23,658 585,243 Severance and restructuring expenses 2,966 1,496 118 4,580 Acquisition-related expenses 4,278 — 169 4,447 Earnings from operations $ 116,921 $ 23,922 $ 7,989 $ 148,832
Summary of Total Assets by Reportable Operating Segment	The following table is a summary of our total assets by reportable operating segment (in thousands): December 31, 2018 December 31, 2017 North America $ 2,660,886 $ 2,337,573 EMEA 611,338 530,242 APAC 98,959 101,169 Corporate assets and intercompany eliminations, net (595,236 ) (283,333 ) Total assets $ 2,775,947 $ 2,685,651
Summary of Geographic Net Sales and Long-Lived Assets	The following is a summary of our geographic net sales and long-lived assets, consisting of property and equipment, net (in thousands): United States United Kingdom Other Foreign Total 2018 Net sales $ 5,100,456 $ 843,145 $ 1,136,535 $ 7,080,136 Total long-lived assets $ 52,346 $ 12,434 $ 8,174 $ 72,954 2017 Net sales $ 4,933,805 $ 684,632 $ 1,085,186 $ 6,703,623 Total long-lived assets $ 50,462 $ 14,783 $ 10,007 $ 75,252 2016 Net sales $ 3,776,352 $ 671,999 $ 1,037,164 $ 5,485,515
Pre-Tax Depreciation and Amortization by Operating Segment	We recorded the following pre-tax amounts, by operating segment, for depreciation and amortization in the accompanying consolidated financial statements (in thousands): Years Ended December 31, 2018 2017 2016 Depreciation and amortization of property and equipment: North America $ 17,164 $ 20,241 $ 21,952 EMEA 4,058 5,025 4,908 APAC 499 521 633 21,721 25,787 27,493 Amortization of intangible assets: North America 14,791 15,971 8,139 EMEA 285 73 1,951 APAC 661 768 547 15,737 16,812 10,637 Total $ 37,458 $ 42,599 $ 38,130

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Summary of Purchase Price and Estimated Fair Value of Assets Acquired and Liabilities Assumed	The following table summarizes the purchase price and the estimated fair value of the assets acquired and liabilities assumed at the date of acquisition (in thousands): Total purchase price $ 257,456 Fair value of net assets acquired: Current assets $ 238,577 Identifiable intangible assets – see description below 94,500 Property and equipment 5,843 Other assets 17,888 Current liabilities (129,071 ) Long-term liabilities, including deferred taxes (34,421 ) Total fair value of net assets acquired 193,316 Excess purchase price over fair value of net assets acquired (“goodwill”) $ 64,140
Estimated Useful Lives of Identifiable Intangibles	The identifiable intangibles resulting from the acquisition are amortized using the straight-line method over the following estimated useful lives: Intangible Assets Estimated Economic Life Customer relationships 10 Years Trade name 1 Year Non-compete agreements 1 Year
Summary of Pro Forma Information	The following table reports pro forma information as if the acquisition of Datalink had been completed at the beginning of the earliest period presented (in thousands, except per share amounts): Year Ended December 31, 2017 2016 Net sales As reported $ 6,703,623 $ 5,485,515 Proforma $ 6,707,533 $ 6,084,484 Net earnings As reported $ 90,683 $ 84,690 Proforma $ 92,276 $ 85,823 Diluted earnings per share As reported $ 2.50 $ 2.32 Proforma $ 2.55 $ 2.36

Selected Quarterly Financial _2

Selected Quarterly Financial Information (Tables)	12 Months Ended
	Dec. 31, 2018
Quarterly Financial Information Disclosure [Abstract]
Consolidated Quarterly Financial Information	The following tables set forth selected unaudited consolidated quarterly financial information for 2018 and 2017 (in thousands, except per share data): Quarters Ended December 31, 2018 September 30, 2018 June 30, 2018 (1) March 31, 2018 (1) Net sales $ 1,749,046 $ 1,747,726 $ 1,840,870 $ 1,742,494 Costs of goods sold 1,494,882 1,512,812 1,576,493 1,502,231 Gross profit 254,164 234,914 264,377 240,263 Operating expenses: Selling and administrative expenses 194,790 184,095 189,464 188,180 Severance and restructuring expenses 715 683 382 1,644 Acquisition-related expenses — 188 94 — Earnings from operations 58,659 49,948 74,437 50,439 Non-operating (income) expense: Interest income (422 ) (330 ) (170 ) (153 ) Interest expense 5,563 6,132 5,102 6,015 Net foreign currency exchange (gain) loss (1,517 ) 539 (275 ) (245 ) Other expense, net 323 393 324 302 Earnings before income taxes 54,712 43,214 69,456 44,520 Income tax expense 7,671 11,060 17,977 11,517 Net earnings $ 47,041 $ 32,154 $ 51,479 $ 33,003 Net earnings per share: Basic $ 1.33 $ 0.91 $ 1.45 $ 0.92 Diluted $ 1.31 $ 0.89 $ 1.44 $ 0.91 Shares used in per share calculations: Basic 35,480 35,468 35,483 35,913 Diluted 35,999 35,957 35,815 36,263 Quarters Ended December 31, 2017 September 30, 2017 June 30, 2017 March 31, 2017 Net sales $ 1,784,075 $ 1,757,973 $ 1,684,032 $ 1,477,543 Costs of goods sold 1,551,192 1,531,892 1,432,653 1,269,316 Gross profit 232,883 226,081 251,379 208,227 Operating expenses: Selling and administrative expenses 184,554 180,390 180,752 177,632 Severance and restructuring expenses 2,791 494 1,022 4,695 Loss on sale of foreign entity — 3,646 — — Acquisition-related expenses — 106 276 2,947 Earnings from operations 45,538 41,445 69,329 22,953 Non-operating (income) expense: Interest income (346 ) (227 ) (205 ) (431 ) Interest expense 5,360 5,555 4,326 3,933 Net foreign currency exchange (gain) loss (117 ) 341 251 380 Other expense, net 367 339 326 315 Earnings before income taxes 40,274 35,437 64,631 18,756 Income tax expense 26,106 13,025 24,376 4,908 Net earnings $ 14,168 $ 22,412 $ 40,255 $ 13,848 Net earnings per share: Basic $ 0.40 $ 0.63 $ 1.13 $ 0.39 Diluted $ 0.39 $ 0.62 $ 1.11 $ 0.38 Shares used in per share calculations: Basic 35,809 35,787 35,765 35,602 Diluted 36,272 36,203 36,169 36,185 (1) During the quarter ended September 30, 2018, we revised our previously issued March 31, 2018 and June 30, 2018 consolidated financial statements for immaterial errors identified. The errors primarily relate to incorrect presentation of certain software revenue transactions. The effect of the revision on our consolidated statements of operations for the three months ended March 31, 2018 was to reduce product net sales by $24,364,000, increase services net sales by $3,953,000, reduce product cost of goods sold by $23,749,000 and increase services cost of goods sold by $3,080,000. For the three months ended March 31, 2018, gross profit, earnings from operations and net earnings increased by $258,000. Diluted earnings per share for the three months ended March 31, 2018 increased $0.01. The effect of the revision on our consolidated statement of operations for the three months ended June 30, 2018 was to reduce product net sales by $949,000, increase services net sales by $4,900,000, reduce product cost of goods sold by $532,000 and increase services cost of goods sold by $4,483,000. The effect of the revision on our consolidated statement of operations for the six months ended June 30, 2018 was to reduce product net sales by $25,313,000, increase services net sales by $8,853,000, reduce product cost of goods sold by $24,281,000 and increase services cost of goods sold by $7,563,000. For the three months ended June 30, 2018, there was no impact to gross profit, earnings from operations or net earnings resulting from the revision. For the six months ended June 30, 2018, gross profit, earnings from operations and net earnings increased by $258,000. There was no impact to diluted earnings per share in either the three or six months ended June 30, 2018. These revisions are appropriately reflected in the consolidated statement of operations for the year ended December 31, 2018. There is no impact to the audited consolidated financial statements for 2017, 2016 or any other prior period.

Operations and Summary of Sig_4

Operations and Summary of Significant Accounting Policies - Additional Information (Detail)	Aug. 01, 2018USD ($)	Sep. 26, 2017USD ($)	Jan. 06, 2017USD ($)	Sep. 01, 2016USD ($)	Dec. 31, 2018USD ($)Segmentshares	Dec. 31, 2017USD ($)shares	Dec. 31, 2016USD ($)shares	Jan. 01, 2019USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of operating segments | Segment					3
Acquisitions, net of cash and cash equivalents acquired					$ 74,938,000	$ 186,932,000	$ 10,297,000
Partner funding recorded as reduction of selling and administrative expenses					68,571,000	53,227,000	48,114,000
Advertising expense					$ 57,448,000	$ 47,053,000	$ 37,565,000
Restricted Stock Units (RSUs) [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
RSUs excluded from the diluted EPS calculations | shares					17,000	40,000	36,000
Maximum [Member] | Accounting Standards Update 2016-02 [Member] | Proforma [Member] | Subsequent Event [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Estimated additional ROU assets								$ 80,000,000
Estimated additional lease liabilities								80,000,000
Minimum [Member] | Accounting Standards Update 2016-02 [Member] | Proforma [Member] | Subsequent Event [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Estimated additional ROU assets								70,000,000
Estimated additional lease liabilities								$ 70,000,000
Credit Risk [Member] | Net Sales [Member] | Single Customer [Member] | Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Concentration percentage					4.00%
Supplier Risk [Member] | Purchases [Member] | Microsoft [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Concentration percentage					26.00%
Supplier Risk [Member] | Purchases [Member] | Top Five Suppliers [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Concentration percentage					60.00%
Supplier Risk [Member] | Purchases [Member] | Maximum [Member] | Significant Supplier [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Concentration percentage					10.00%
Cardinal Solutions Group, Inc [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Acquisitions, net of cash and cash equivalents acquired	$ 78,800,000
Business acquisition, effective date of acquisition	Aug. 1, 2018
Caase Group, B.V. [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Acquisitions, net of cash and cash equivalents acquired		$ 6,038,000
Business acquisition, effective date of acquisition		Sep. 26, 2017
Datalink Corporation [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Acquisitions, net of cash and cash equivalents acquired			$ 257,456,000
Business acquisition, effective date of acquisition			Jan. 6, 2017
Payments to acquire businesses, net of cash and cash equivalents acquired			$ 76,597,000
Ignia Pty Ltd [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Acquisitions, net of cash and cash equivalents acquired				$ 10,804,000
Business acquisition, effective date of acquisition				Sep. 1, 2016

Operations and Summary of Sig_5

Operations and Summary of Significant Accounting Policies - Estimated Economic Lives of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Leasehold improvements	Shorter of underlying lease term or asset life
Furniture and fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful Life	2 years
Furniture and fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful Life	7 years
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful Life	5 years
Software [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful Life	3 years
Software [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful Life	10 years
Buildings [Member]
Property, Plant and Equipment [Line Items]
Useful Life	29 years

Operations and Summary of Sig_6

Operations and Summary of Significant Accounting Policies - Reconciliation of Denominators of Basic and Diluted EPS Calculations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Numerator:
Net earnings	$ 47,041	$ 32,154	$ 51,479	$ 33,003	$ 14,168	$ 22,412	$ 40,255	$ 13,848	$ 163,677	$ 90,683	$ 84,690
Denominator:
Weighted-average shares used to compute basic EPS	35,480	35,468	35,483	35,913	35,809	35,787	35,765	35,602	35,586	35,741	36,102
Dilutive potential common shares due to dilutive RSUs, net of tax effect									423	466	336
Weighted-average shares used to compute diluted EPS	35,999	35,957	35,815	36,263	36,272	36,203	36,169	36,185	36,009	36,207	36,438
Net earnings per share:
Basic	$ 1.33	$ 0.91	$ 1.45	$ 0.92	$ 0.40	$ 0.63	$ 1.13	$ 0.39	$ 4.60	$ 2.54	$ 2.35
Diluted	$ 1.31	$ 0.89	$ 1.44	$ 0.91	$ 0.39	$ 0.62	$ 1.11	$ 0.38	$ 4.55	$ 2.50	$ 2.32

Operations and Summary of Sig_7

Operations and Summary of Significant Accounting Policies - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 142,655	$ 105,831	$ 202,882
Restricted cash included in other current assets	8	46	51
Restricted cash included in other non-current assets	1,630	1,568	3,013
Total cash, cash equivalents and restricted cash shown in the statement of cash flows	$ 144,293	$ 107,445	$ 205,946

New Accounting Standard - Sal_3

New Accounting Standard - Sales Recognition - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative impact of adoption of accounting standards in retained earnings	$ 704,665,000	$ 550,220,000
Net cash provided by (used in) operating activities	292,647,000	(307,066,000)	$ 96,077,000
Net cash used in investing activities	(91,710,000)	(204,645,000)	(21,185,000)
Net cash (used in) provided by financing activities	$ (159,028,000)	$ 397,121,000	$ (58,230,000)
Description of expected duration	Topic 606 allows for certain practical expedients which we have elected to apply. As a result, with the exception of remaining performance obligations associated with our OneCall Support Services contracts which are included in the table above regardless of original duration, we do not disclose information about remaining performance obligations that have original expected durations of one year or less in the table above. Amounts not included in the table above have an average original expected duration of eight months.
Time and material contracts expected duration	12 months
Performance period of contracts	1 year
Related asset balance	$ 2,763,000
Expected recognition period of related asset	36 months
Contract period	The majority of our contracts are completed within a one-year performance period, and for contracts with a specified term of one year or less
Revenue, practical expedient, incremental cost of obtaining contract	true
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative impact of adoption of accounting standards in retained earnings	$ 9,311,000			$ 7,176,000
Net cash provided by (used in) operating activities	0
Net cash used in investing activities	0
Net cash (used in) provided by financing activities	$ 0

New Accounting Standard - Sal_4

New Accounting Standard - Sales Recognition - Summary of Impact of Adoption of Topic 606 On Balance Sheet (Detail) - USD ($)	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cash and cash equivalents	$ 142,655,000		$ 105,831,000	$ 202,882,000
Accounts receivable, net	1,931,736,000		1,814,560,000
Inventories	148,503,000		194,529,000
Inventories not available for sale			36,956,000
Other current assets	115,683,000		152,467,000
Total current assets	2,338,577,000		2,304,343,000
Property and equipment, net	72,954,000		75,252,000
Goodwill	166,841,000		131,431,000
Intangible assets, net	112,179,000		100,778,000
Deferred income taxes	7,967,000		17,064,000
Other assets	77,429,000		56,783,000
Total assets	2,775,947,000		2,685,651,000
Accounts payable—trade	978,104,000		899,075,000
Accounts payable—inventory financing facility	304,130,000		319,468,000
Accrued expenses and other current liabilities	190,733,000		175,860,000
Current portion of long-term debt	1,395,000		16,592,000
Deferred revenue	62,300,000		88,979,000
Total current liabilities	1,536,662,000		1,499,974,000
Long-term debt	195,525,000		296,576,000
Deferred income taxes	683,000		717,000
Other liabilities	56,088,000		44,915,000
Total liabilities	1,788,958,000		1,842,182,000
Stockholders’ equity:
Preferred stock
Common stock	355,000		358,000
Additional paid-in capital	323,622,000		317,155,000
Retained earnings	704,665,000		550,220,000
Accumulated other comprehensive loss – foreign currency translation adjustments	(41,653,000)		(24,264,000)
Total stockholders’ equity	986,989,000		843,469,000	$ 713,443,000	$ 685,742,000
Total liabilities and stockholders' equity	2,775,947,000		$ 2,685,651,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	145,184,000
Inventories not available for sale	(118,936,000)
Other current assets	(39,684,000)
Total current assets	(13,436,000)
Other assets	13,762,000
Total assets	326,000
Accounts payable—trade	84,504,000
Accrued expenses and other current liabilities	16,557,000
Deferred revenue	(121,526,000)
Total current liabilities	(20,465,000)
Other liabilities	11,443,000
Total liabilities	(9,022,000)
Stockholders’ equity:
Preferred stock
Retained earnings	9,311,000	$ 7,176,000
Accumulated other comprehensive loss – foreign currency translation adjustments	37,000
Total stockholders’ equity	9,348,000
Total liabilities and stockholders' equity	326,000
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cash and cash equivalents	142,655,000
Accounts receivable, net	1,786,552,000
Inventories	148,503,000
Inventories not available for sale	118,936,000
Other current assets	155,367,000
Total current assets	2,352,013,000
Property and equipment, net	72,954,000
Goodwill	166,841,000
Intangible assets, net	112,179,000
Deferred income taxes	7,967,000
Other assets	63,667,000
Total assets	2,775,621,000
Accounts payable—trade	893,600,000
Accounts payable—inventory financing facility	304,130,000
Accrued expenses and other current liabilities	174,176,000
Current portion of long-term debt	1,395,000
Deferred revenue	183,826,000
Total current liabilities	1,557,127,000
Long-term debt	195,525,000
Deferred income taxes	683,000
Other liabilities	44,645,000
Total liabilities	1,797,980,000
Stockholders’ equity:
Preferred stock
Common stock	355,000
Additional paid-in capital	323,622,000
Retained earnings	695,354,000
Accumulated other comprehensive loss – foreign currency translation adjustments	(41,690,000)
Total stockholders’ equity	977,641,000
Total liabilities and stockholders' equity	$ 2,775,621,000

New Accounting Standard - Sal_5

New Accounting Standard - Sales Recognition - Summary of Impact of Adoption of Topic 606 On Statement of Operations (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales:
Total net sales	$ 1,749,046	$ 1,747,726	$ 1,840,870	$ 1,742,494	$ 1,784,075	$ 1,757,973	$ 1,684,032	$ 1,477,543	$ 7,080,136	$ 6,703,623	$ 5,485,515
Costs of goods sold:
Total costs of goods sold	1,494,882	1,512,812	1,576,493	1,502,231	1,551,192	1,531,892	1,432,653	1,269,316	6,086,418	5,785,053	4,742,413
Gross profit	254,164	234,914	264,377	240,263	232,883	226,081	251,379	208,227	993,718	918,570	743,102
Operating expenses:
Selling and administrative expenses	194,790	184,095	189,464	188,180	184,554	180,390	180,752	177,632	756,529	723,328	585,243
Severance and restructuring expenses	715	683	382	1,644	2,791	494	1,022	4,695	3,424	9,002	4,580
Acquisition-related expenses		188	94			106	276	2,947	282	3,329	4,447
Earnings from operations	58,659	49,948	74,437	50,439	45,538	41,445	69,329	22,953	233,483	179,265	148,832
Non-operating expense, net									21,581
Earnings before income taxes	54,712	43,214	69,456	44,520	40,274	35,437	64,631	18,756	211,902	159,098	139,458
Income tax expense	7,671	11,060	17,977	11,517	26,106	13,025	24,376	4,908	48,225	68,415	54,768
Net earnings	$ 47,041	$ 32,154	$ 51,479	$ 33,003	$ 14,168	$ 22,412	$ 40,255	$ 13,848	$ 163,677	$ 90,683	$ 84,690
Net earnings per share:
Basic	$ 1.33	$ 0.91	$ 1.45	$ 0.92	$ 0.40	$ 0.63	$ 1.13	$ 0.39	$ 4.60	$ 2.54	$ 2.35
Diluted	$ 1.31	$ 0.89	$ 1.44	$ 0.91	$ 0.39	$ 0.62	$ 1.11	$ 0.38	$ 4.55	$ 2.50	$ 2.32
Shares used in per share calculations:
Basic	35,480	35,468	35,483	35,913	35,809	35,787	35,765	35,602	35,586	35,741	36,102
Diluted	35,999	35,957	35,815	36,263	36,272	36,203	36,169	36,185	36,009	36,207	36,438
Products [Member]
Net sales:
Total net sales									$ 6,249,938	$ 6,038,744	$ 4,997,263
Costs of goods sold:
Total costs of goods sold									5,711,400	5,512,402	4,571,462
Services [Member]
Net sales:
Total net sales									830,198	664,879	488,252
Costs of goods sold:
Total costs of goods sold									375,018	$ 272,651	$ 170,951
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Net sales:
Total net sales									(37,822)
Costs of goods sold:
Total costs of goods sold									(40,095)
Gross profit									2,273
Operating expenses:
Selling and administrative expenses									(373)
Earnings from operations									2,646
Non-operating expense, net									8
Earnings before income taxes									2,654
Income tax expense									519
Net earnings									$ 2,135
Net earnings per share:
Basic									$ 0.06
Diluted									$ 0.06
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Products [Member] | Accounting Standards Update 2014-09 [Member]
Net sales:
Total net sales									$ (49,497)
Costs of goods sold:
Total costs of goods sold									(39,616)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Services [Member] | Accounting Standards Update 2014-09 [Member]
Net sales:
Total net sales									11,675
Costs of goods sold:
Total costs of goods sold									(479)
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
Net sales:
Total net sales									7,117,958
Costs of goods sold:
Total costs of goods sold									6,126,513
Gross profit									991,445
Operating expenses:
Selling and administrative expenses									756,902
Severance and restructuring expenses									3,424
Acquisition-related expenses									282
Earnings from operations									230,837
Non-operating expense, net									21,589
Earnings before income taxes									209,248
Income tax expense									47,706
Net earnings									$ 161,542
Net earnings per share:
Basic									$ 4.54
Diluted									$ 4.49
Shares used in per share calculations:
Basic									35,586
Diluted									36,009
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Products [Member] | Accounting Standards Update 2014-09 [Member]
Net sales:
Total net sales									$ 6,299,435
Costs of goods sold:
Total costs of goods sold									5,751,016
Calculated under Revenue Guidance in Effect before Topic 606 [Member] | Services [Member] | Accounting Standards Update 2014-09 [Member]
Net sales:
Total net sales									818,523
Costs of goods sold:
Total costs of goods sold									$ 375,497

New Accounting Standard - Sal_6

New Accounting Standard - Sales Recognition - Summary of Revenue Disaggregated by Reportable Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue	$ 1,749,046	$ 1,747,726	$ 1,840,870	$ 1,742,494	$ 1,784,075	$ 1,757,973	$ 1,684,032	$ 1,477,543	$ 7,080,136	$ 6,703,623	$ 5,485,515
Gross Revenue Recognition (Principal) [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									6,747,601
Net Revenue Recognition (Agent) [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									332,535
Large Enterprise / Corporate [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									5,136,422
Public Sector [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									903,258
Small and Medium-Sized Businesses [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									1,040,456
Hardware Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									4,293,351
Software Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									1,956,587
Services Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									830,198
North America Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									5,362,981	5,181,734	3,971,828
North America Segment [Member] | Gross Revenue Recognition (Principal) [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									5,143,228
North America Segment [Member] | Net Revenue Recognition (Agent) [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									219,753
North America Segment [Member] | Large Enterprise / Corporate [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									3,951,900
North America Segment [Member] | Public Sector [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									498,873
North America Segment [Member] | Small and Medium-Sized Businesses [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									912,208
North America Segment [Member] | Hardware Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									3,610,356	3,352,355	2,454,889
North America Segment [Member] | Software Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									1,112,715	1,310,118	1,146,808
North America Segment [Member] | Services Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									639,910	519,261	370,131
EMEA Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									1,530,241	1,355,416	1,338,560
EMEA Segment [Member] | Gross Revenue Recognition (Principal) [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									1,439,979
EMEA Segment [Member] | Net Revenue Recognition (Agent) [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									90,262
EMEA Segment [Member] | Large Enterprise / Corporate [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									1,134,696
EMEA Segment [Member] | Public Sector [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									327,818
EMEA Segment [Member] | Small and Medium-Sized Businesses [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									67,727
EMEA Segment [Member] | Hardware Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									653,499	536,500	481,505
EMEA Segment [Member] | Software Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									736,509	710,452	762,427
EMEA Segment [Member] | Services Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									140,233	108,464	94,628
APAC Segment [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									186,914	166,473	175,127
APAC Segment [Member] | Gross Revenue Recognition (Principal) [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									164,394
APAC Segment [Member] | Net Revenue Recognition (Agent) [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									22,520
APAC Segment [Member] | Large Enterprise / Corporate [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									49,826
APAC Segment [Member] | Public Sector [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									76,567
APAC Segment [Member] | Small and Medium-Sized Businesses [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									60,521
APAC Segment [Member] | Hardware Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									29,496	27,907	18,916
APAC Segment [Member] | Software Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									107,363	101,412	132,718
APAC Segment [Member] | Services Net Sales [Member]
Disaggregation of Revenue [Line Items]
Disaggregation of Revenue									$ 50,055	$ 37,154	$ 23,493

New Accounting Standard - Sal_7

New Accounting Standard - Sales Recognition - Summary of Information about Receivables,Contract Assets and Contract Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Current receivables, which are included in “Accounts receivable, net”	$ 1,931,736		$ 1,814,560
Contract assets, which are included in “Other current assets”	892		595
Contract liabilities, which are included in “Deferred revenue” and “Other liabilities”	82,117		$ 86,743
Accounts Receivable, Net [Member]
Disaggregation of Revenue [Line Items]
Current receivables, which are included in “Accounts receivable, net”	1,931,736	$ 1,909,074
Other Assets [Member]
Disaggregation of Revenue [Line Items]
Non-current receivables, which are included in “Other assets”	38,157	32,227
Other Current Assets [Member]
Disaggregation of Revenue [Line Items]
Contract assets, which are included in “Other current assets”	892	595
Deferred Revenue and Other Liabilities [Member]
Disaggregation of Revenue [Line Items]
Contract liabilities, which are included in “Deferred revenue” and “Other liabilities”	$ 82,117	$ 86,743

New Accounting Standard - Sal_8

New Accounting Standard - Sales Recognition - Summary of Changes in Contract Assets and Contract Liabilities from Contract with Customers (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Revenue From Contract With Customer [Abstract]
Beginning balance, Contract Assets	$ 595
Reclassification of the beginning contract assets to receivables, as the result of rights to consideration becoming unconditional, Contract Assets	(595)
Contract assets recognized, net of reclassification to receivables, Contract Assets	892
Ending balance, Contract Assets	892
Beginning balance, Contract Liabilities	86,743
Reclassification of the beginning contract liabilities to revenue, as the result of performance obligations satisfied, Contract Liabilities	(72,779)
Cash received in advance and not recognized as revenue, Contract Liabilities	68,153
Ending balance, Contract Liabilities	$ 82,117

New Accounting Standard - Sal_9

New Accounting Standard - Sales Recognition - Summary of Estimated Net Sales Related to Performance Obligation (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 135,803
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 89,011
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 28,911
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 11,251
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 4,413
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 1,841
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 376
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Products [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 18
Products [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 13
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Products [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Services [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 135,785
Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 88,998
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2020-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 28,906
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 11,251
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 4,413
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2023-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 1,841
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Services [Member] | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 376
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period

New Accounting Standard - Sa_10

New Accounting Standard - Sales Recognition - Summary of Estimated Net Sales Related to Performance Obligation (Detail 1) $ in Thousands	Dec. 31, 2018USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 135,803
Products [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	18
Services [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total remaining performance obligations	$ 135,785

Property and Equipment - Proper

Property and Equipment - Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 404,654	$ 410,330
Accumulated depreciation and amortization	(331,700)	(335,078)
Property and equipment, net	72,954	75,252
Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	170,327	171,701
Buildings [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	64,263	65,468
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	100,421	103,542
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	38,200	38,459
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	26,319	25,981
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,124	$ 5,179

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Non- cash charges to write-off certain property and equipment, primarily computer software development costs	$ 393,000	$ 418,000	$ 0
Depreciation and amortization expense	$ 21,721,000	$ 25,787,000	$ 27,493,000

Goodwill - Changes in Carrying

Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Beginning Balance	$ 131,431
Goodwill		$ 551,479
Accumulated impairment losses		(488,834)
Goodwill acquired during the year	36,332	68,786
Foreign currency translation adjustment	(922)
Ending Balance	166,841	131,431
North America Segment [Member]
Goodwill [Line Items]
Beginning Balance	119,828
Goodwill		379,110
Accumulated impairment losses		(323,422)
Goodwill acquired during the year	36,440	64,140
Ending Balance	156,268	119,828
EMEA Segment [Member]
Goodwill [Line Items]
Beginning Balance	4,041
Goodwill		151,439
Accumulated impairment losses		(151,439)
Goodwill acquired during the year		4,041
Goodwill acquired during the year	(108)
Foreign currency translation adjustment	(184)
Ending Balance	3,749	4,041
APAC Segment [Member]
Goodwill [Line Items]
Beginning Balance	7,562
Goodwill		20,930
Accumulated impairment losses		(13,973)
Goodwill acquired during the year		605	$ 6,957
Foreign currency translation adjustment	(738)
Ending Balance	$ 6,824	$ 7,562

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill acquired during the year	$ 36,332	$ 68,786
North America Segment [Member]
Goodwill [Line Items]
Goodwill acquired during the year	$ 36,440	$ 64,140
Business acquisition, effective date of acquisition	Aug. 1, 2018	Jan. 6, 2017
EMEA Segment [Member]
Goodwill [Line Items]
Goodwill acquired during the year		$ 4,041
Business acquisition, effective date of acquisition		Sep. 26, 2017
APAC Segment [Member]
Goodwill [Line Items]
Goodwill acquired during the year		$ 605	$ 6,957
Business acquisition, effective date of acquisition			Sep. 1, 2016

Intangible Assets - Summary of

Intangible Assets - Summary of Intangible Assets, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	$ 165,121	$ 138,135
Accumulated amortization	(52,942)	(37,357)
Intangible assets, net	112,179	100,778
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	159,566	133,660
Other [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets, Gross	$ 5,555	$ 4,475

Intangible Assets - Additional

Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible assets, explanation of significant deletions		The gross intangible assets balance and the accumulated amortization balance were both reduced by approximately $2,516,000
Reduction in gross intangible assets and accumulated amortization balances		$ 2,516,000
Amortization expense	$ 15,737,000	$ 16,812,000	$ 10,637,000

Intangible Assets - Future Amor

Intangible Assets - Future Amortization Expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
2,019	$ 14,602
2,020	14,590
2,021	14,429
2,022	14,256
2,023	13,831
Thereafter	40,471
Intangible assets, net	$ 112,179	$ 100,778

Accounts Payable - Inventory _2

Accounts Payable - Inventory Financing Facility - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Mar. 23, 2018	Mar. 22, 2018
Accounts Payable And Accrued Expenses [Line Items]
Accounts payable—inventory financing facility	$ 304,130,000	$ 319,468,000
Inventory Financing Facility [Member]
Accounts Payable And Accrued Expenses [Line Items]
Inventory financing facility maximum borrowing capacity				$ 400,000,000	$ 325,000,000
Accounts payable—inventory financing facility	$ 304,130,000
Inventory financing facility maturity date	Jun. 23, 2021
Inventory financing facility, interest accrual basis, stated vendor term	60 days
Imputed interest on inventory financing facility	$ 10,593,000	$ 6,736,000	$ 3,385,000
Inventory financing facility interest rate if balances are not paid within stated vendor terms	Prime plus 1.25%
Inventory financing facility rate if vendor terms not met equal prime plus	1.25%

Debt, Capital Lease and Other_3

Debt, Capital Lease and Other Financing Obligations - Long-Term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Long-term debt
Senior revolving credit facility		$ 117,500
Term Loan A (less unamortized debt issuance costs of $873 in 2017)		165,377
Accounts receivable securitization financing facility	$ 194,000	25,000
Capital leases and other financing obligations	2,920	5,291
Total	196,920	313,168
Less: current portion of long-term debt	(1,395)	(16,592)
Long-term debt	$ 195,525	$ 296,576

Debt, Capital Lease and Other_4

Debt, Capital Lease and Other Financing Obligations - Long-Term Debt (Parenthetical) (Detail) $ in Thousands	Dec. 31, 2017USD ($)
Debt Disclosure [Abstract]
Unamortized debt issuance cost	$ 873

Debt, Capital Lease and Other_5

Debt, Capital Lease and Other Financing Obligations - Additional Information (Detail) - USD ($)	Jan. 06, 2017	Oct. 31, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Accounts receivable securitization financing facility			$ 194,000,000	$ 25,000,000
Noncash capital lease excluded from consolidated statements of cash flows			977,000	977,000
Amount owed under other financing agreement			0	$ 2,489,000
Minimum [Member]
Debt Instrument [Line Items]
Capitalized lease term		30 month		36 month	36 month
Maximum [Member]
Debt Instrument [Line Items]
Capitalized lease term		33 month		40 month	40 month
Senior Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity			$ 350,000,000
Applicable floating interest rate			3.66%
Weighted average amount outstanding borrowings			$ 16,684,000	$ 63,604,000	$ 35,811,000
Amount available under line of credit facility			$ 350,000,000
Line of credit maturity date			Jun. 23, 2021
Credit facility, interest rate at period end			3.66%
Senior Revolving Credit Facility [Member] | Minimum [Member]
Debt Instrument [Line Items]
Commitment on the unused portion of the facility			0.25%
Participation fee on letter of credit			1.25%
Senior Revolving Credit Facility [Member] | Maximum [Member]
Debt Instrument [Line Items]
Commitment on the unused portion of the facility			0.45%
Participation fee on letter of credit			2.25%
Senior Revolving Credit Facility [Member] | Prime Rate [Member]
Debt Instrument [Line Items]
Interest rate description			Prime rate plus a predetermined spread of 0.00% to 0.75%
Senior Revolving Credit Facility [Member] | Prime Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Pre-determined spread			0.00%
Senior Revolving Credit Facility [Member] | Prime Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Pre-determined spread			0.75%
Senior Revolving Credit Facility [Member] | LIBOR Rate [Member]
Debt Instrument [Line Items]
Interest rate description			LIBOR rate plus a pre-determined spread of 1.25% to 2.25%.
Senior Revolving Credit Facility [Member] | LIBOR Rate [Member] | Minimum [Member]
Debt Instrument [Line Items]
Pre-determined spread			1.25%
Senior Revolving Credit Facility [Member] | LIBOR Rate [Member] | Maximum [Member]
Debt Instrument [Line Items]
Pre-determined spread			2.25%
Senior Revolving Credit Facility [Member] | Datalink [Member]
Debt Instrument [Line Items]
Incremental borrowings under Term Loan A	$ 175,000,000
Senior Revolving Credit Facility [Member] | Foreign Currency Borrowings [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity			$ 50,000,000
Senior Revolving Credit Facility and Term Loan A [Member]
Debt Instrument [Line Items]
Interest expense			8,198,000	8,491,000	2,191,000
ABS Facility [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity			250,000,000
Weighted average amount outstanding borrowings			$ 98,663,000	153,759,000	$ 145,376,000
Line of credit maturity date			Jun. 23, 2021
Line of credit maturity period			3 years
Receivables at fair value			$ 1,101,597,000	$ 1,141,520,000
Amount of facility permitted by qualified receivables			250,000,000
Accounts receivable securitization financing facility			$ 194,000,000
Credit facility, interest rate at period end			3.46%
Credit facility, usage fee			0.85%
Monthly commitment fee on unused portion of ABS facility			0.375%
Weighted average interest rate			3.60%	2.40%	1.90%
Outstanding borrowings at period end			$ 194,000,000
Senior Revolving Credit Facility Term Loan A and Asset Backed Securitization Facility [Member]
Debt Instrument [Line Items]
Credit facility, borrowing capacity			$ 600,000,000
Maximum leverage ratio times adjusted earnings			3.25

Debt, Capital Lease and Other_6

Debt, Capital Lease and Other Financing Obligations - Schedule of Future Minimum Lease Payments for Capital Leases (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Capital Lease Obligations [Abstract]
2,019	$ 1,488
2,020	1,151
2,021	432
Total minimum lease payments	3,071
Less amount representing interest	(151)
Present value of minimum lease payments	$ 2,920

Operating Leases - Additional I

Operating Leases - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Leases [Abstract]
Operating leases rental expense	$ 20,114,000	$ 19,126,000	$ 14,444,000
Non-cancellable rental income, 2019	$ 1,600,000

Operating Leases - Future Minim

Operating Leases - Future Minimum Lease Payment (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 21,499
2,020	15,580
2,021	12,121
2,022	9,150
2,023	6,296
Thereafter	7,238
Total minimum lease payments	$ 71,884

Severance and Restructuring A_3

Severance and Restructuring Activities - Activity Related to Resource Actions and Outstanding Obligations (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Beginning balance	$ 4,640	$ 2,164	$ 3,488
Severance costs, net of adjustments	3,424	9,002	4,580
Cash payments	(5,534)	(7,022)	(5,881)
Foreign currency translation adjustments	(78)	496	(23)
Ending balance	2,452	4,640	2,164
North America Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	1,631	947	505
Severance costs, net of adjustments	1,617	4,010	2,966
Cash payments	(2,003)	(3,336)	(2,524)
Foreign currency translation adjustments	(41)	10
Ending balance	1,204	1,631	947
EMEA Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	2,994	1,217	2,983
Severance costs, net of adjustments	1,677	4,888	1,496
Cash payments	(3,386)	(3,597)	(3,239)
Foreign currency translation adjustments	(37)	486	(23)
Ending balance	1,248	2,994	1,217
APAC Segment [Member]
Restructuring Cost and Reserve [Line Items]
Beginning balance	15
Severance costs, net of adjustments	130	104	118
Cash payments	$ (145)	(89)	$ (118)
Ending balance		$ 15

Stock-Based Compensation - Pre-

Stock-Based Compensation - Pre-tax Amounts by Operating Segment for Stock-Based Compensation (Detail) - Restricted Stock Units (RSUs) [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense related to restricted stock units (RSUs)	$ 15,355	$ 12,826	$ 11,058
Selling and Administrative Expenses [Member] | North America Segment [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense related to restricted stock units (RSUs)	11,697	9,697	8,096
Selling and Administrative Expenses [Member] | EMEA Segment [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense related to restricted stock units (RSUs)	3,170	2,737	2,530
Selling and Administrative Expenses [Member] | APAC Segment [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense related to restricted stock units (RSUs)	$ 488	$ 392	$ 432

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Description of share based compensation under Amended 2007 Omnibus Plan	Our Board of Directors adopted the Amended Insight Enterprises, Inc. 2007 Omnibus Plan (the “Plan”) on March 28, 2011.
Maximum number of authorized shares	7,250,000
Number of shares of stock available for grant	2,791,688
Payments for teammates' tax obligations to taxing authorities	$ 3,230,000	$ 5,318,000	$ 2,219,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost related to RSU's not yet recognized	$ 21,104,000
Weighted average number of years for recognition of outstanding nonvested RSUs	1 year 3 months 21 days
Shares withheld to cover taxes	88,638	122,255	84,953
Payments for teammates' tax obligations to taxing authorities	$ 3,230,000	$ 5,318,000	$ 2,219,000

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary of Restricted Stock Units Activity (Detail) - Restricted Stock Units (RSUs) [Member] - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Nonvested Number, Beginning balance	892,113
Number, Granted	557,823
Number, Vested, including shares withheld to cover taxes	(383,672)
Number, Forfeited	(45,334)
Nonvested Number, Ending balance	1,020,930	892,113
Nonvested Weighted Average Grant Date Fair Value, Beginning balance	$ 32.86
Weighted Average Grant Date Fair Value, Granted	36.79
Weighted Average Grant Date Fair Value, Vested, including shares withheld to cover taxes	29.80
Weighted Average Grant Date Fair Value, Forfeited	34.10
Nonvested Weighted Average Grant Date Fair Value, Ending balance	$ 36.10	$ 32.86
Fair Value, Vested, including shares withheld to cover taxes	$ 14,302,223	$ 20,284,762	$ 9,235,102
Fair Value, Nonvested at end of period	$ 41,602,898

Stock-Based Compensation - Su_2

Stock-Based Compensation - Summary of Restricted Stock Units Activity (Parenthetical) (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing stock price	$ 40.75
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value for vested shares of RSUs	$ 14,302,223	$ 20,284,762	$ 9,235,102

Income Taxes - Income Tax Expen

Income Taxes - Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
U.S. Federal									$ 18,334	$ 31,067	$ 27,947
U.S. State and local									3,218	3,636	2,200
Foreign									17,547	14,573	14,104
Total current income tax expense									39,099	49,276	44,251
Deferred:
U.S. Federal									8,123	20,327	10,395
U.S. State and local									1,142	(427)	1,088
Foreign									(139)	(761)	(966)
Total deferred income tax expense									9,126	19,139	10,517
Income tax expense	$ 7,671	$ 11,060	$ 17,977	$ 11,517	$ 26,106	$ 13,025	$ 24,376	$ 4,908	$ 48,225	$ 68,415	$ 54,768

Income Taxes - Earnings Before

Income Taxes - Earnings Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
United States									$ 145,907	$ 119,330	$ 99,095
Foreign									65,995	39,768	40,363
Earnings before income taxes	$ 54,712	$ 43,214	$ 69,456	$ 44,520	$ 40,274	$ 35,437	$ 64,631	$ 18,756	$ 211,902	$ 159,098	$ 139,458

Income Taxes - Schedule Reconci

Income Taxes - Schedule Reconciles Difference between U.S. Federal Income Taxes at U.S. Statutory Rate and Our Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory federal income tax rate, Amount									$ 44,499	$ 55,684	$ 48,810
State income tax expense, net of federal income tax benefit									6,767	2,808	3,368
Audits and adjustments, net									2,659	(313)	(1,039)
Change in valuation allowances									60	2,472	3,742
Foreign income taxed at different rates									2,639	(6,057)	(6,611)
U.S. mandatory deemed repatriation									(1,396)	5,625
Adjustment of net deferred tax assets for enacted U.S. federal tax reform									(4,198)	7,738
Research and development credits									(4,132)
Change in U.S. tax law applicable to certain foreign entities											2,577
Non-deductible compensation									1,399	571	518
Other, net									(72)	(113)	3,403
Income tax expense	$ 7,671	$ 11,060	$ 17,977	$ 11,517	$ 26,106	$ 13,025	$ 24,376	$ 4,908	$ 48,225	$ 68,415	$ 54,768
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory federal income tax rate									21.00%	35.00%	35.00%
State income tax expense, net of federal income tax benefit, Rate									3.20%	1.80%	2.40%
Audits and adjustments, net, Rate									1.30%	(0.20%)	(0.70%)
Change in valuation allowances, Rate										1.50%	2.70%
Foreign income taxed at different rates, Rate									1.20%	(3.80%)	(4.70%)
U.S. mandatory deemed repatriation, Rate									(0.70%)	3.50%
Adjustment of net deferred tax assets for enacted U.S. federal tax reform, Rate									(2.00%)	4.90%
Research and development credits, Rate									(1.90%)
Change in U.S. tax law applicable to certain foreign entities, Rate											1.80%
Non-deductible compensation, Rate									0.70%	0.40%	0.40%
Other, net, Rate										(0.10%)	2.40%
Effective tax rate									22.80%	43.00%	39.30%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax [Line Items]
Statutory federal income tax rate	21.00%	35.00%	35.00%
Income tax benefit from the remeasurement of U.S.deferred income taxes	$ 5,600,000
Tax Cuts And Jobs Act Of2017 Reduction In Effective Income Tax Rate	2.70%
Non-deductible acquisition-related expenses		$ 349,000	$ 1,296,000
Valuation allowances	$ 40,630,000	45,995,000	$ 30,972,000
Unrecognized tax benefits	6,849,000	4,273,000
Unrecognized tax benefits, interest on income taxes accrued	$ 313,000	$ 287,000
Period during which examination phase of tax audits may conclude, description	Although the timing of the resolutions and/or closures of audits is highly uncertain, it is reasonably possible that the examination phase of these audits may be concluded within the next 12 months which could significantly increase or decrease the balance of our gross unrecognized tax benefits.
Period during which federal income tax returns remain open to examination	2014, 2015, 2016, 2017 and 2018
Statute of limitations for tax examination, Minimum	3 years
Statute of limitations for tax examination, Maximum	10 years
Earliest Tax Year [Member]
Income Tax [Line Items]
Open tax year	2,012
Latest Tax Year [Member]
Income Tax [Line Items]
Open tax year	2,017
State and Local Jurisdictions [Member]
Income Tax [Line Items]
Net operating loss carry forward	$ 1,403,000
United States [Member]
Income Tax [Line Items]
Net operating loss carry forward	$ 252,000
Operating loss expiration year	2,019
Operating loss expiration year	2,037
Foreign [Member]
Income Tax [Line Items]
Net operating loss carry forward	$ 84,266,000
Operating loss carryforward, which will expire	$ 5,329,000
Operating loss expiration year	2,019
Operating loss expiration year	2,025

Income Taxes - Significant Comp

Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred tax assets:
Net operating losses	$ 23,926,000	$ 25,418,000
Foreign tax credits	16,800,000	21,346,000
Accruals	4,242,000	5,921,000
Stock-based compensation	3,173,000	3,023,000
Property and equipment	2,008,000	1,111,000
Accounts receivable	1,980,000	2,124,000
Goodwill and other intangibles	1,296,000	4,717,000
Deferred revenue	1,016,000	600,000
Inventories	133,000	1,930,000
Other	2,487,000	335,000
Gross deferred tax assets	57,061,000	66,525,000
Valuation allowances	(40,630,000)	(45,995,000)	$ (30,972,000)
Total deferred tax assets	16,431,000	20,530,000
Deferred tax liabilities:
Inventories	(4,885,000)
Accrued withholding tax	(1,303,000)	(1,452,000)
Goodwill and other intangibles	(1,202,000)	(1,587,000)
Other	(1,757,000)	(1,144,000)
Total deferred tax liabilities	(9,147,000)	(4,183,000)
Net deferred tax assets	$ 7,284,000	$ 16,347,000

Income Taxes - Net Non-Current

Income Taxes - Net Non-Current Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Net non-current deferred tax assets	$ 7,967	$ 17,064
Net non-current deferred tax liabilities	(683)	(717)
Net deferred tax assets	$ 7,284	$ 16,347

Income Taxes - Change in Valuat

Income Taxes - Change in Valuation Allowance (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Valuation allowances at beginning of year	$ 45,995,000	$ 30,972,000
Increase in income tax expense	60,000	2,472,000	$ 3,742,000
U.S. federal tax reform	(1,589,000)	11,623,000
Foreign currency translation adjustments	(1,180,000)	2,865,000
Other	(2,656,000)	(1,937,000)
Valuation allowances at end of year	$ 40,630,000	$ 45,995,000	$ 30,972,000

Income Taxes - Reconciliation o

Income Taxes - Reconciliation of Unrecognized Tax Benefits (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2018USD ($)
Income Tax Disclosure [Abstract]
Beginning Balance	$ 3,986
Additions for tax positions in prior periods	1,613
Additions for tax positions in current period	2,014
Subtractions due to foreign currency translation	(8)
Subtractions due to audit settlements and statute expirations	(1,069)
Ending Balance	$ 6,536

Market Risk Management - Additi

Market Risk Management - Additional Information (Detail) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Line Of Credit Facility [Line Items]
Debt outstanding		$ 117,500,000
Senior Revolving Credit Facility [Member]
Line Of Credit Facility [Line Items]
Debt outstanding	$ 0
Interest rate	3.66%
Term Loan A [Member]
Line Of Credit Facility [Line Items]
Debt outstanding	$ 0
ABS Facility [Member]
Line Of Credit Facility [Line Items]
Debt outstanding	$ 194,000,000
Interest rate	3.46%

Benefit Plans - Additional Info

Benefit Plans - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Compensation Related Costs [Abstract]
Discretionary match contribution to defined contribution plan provided to participants-U.S. teammates	50.00%
Maximum pre-tax contributions of compensation per pay period eligible for match- U.S. teammates	6.00%
Contribution expense	$ 15,216,000	$ 14,083,000	$ 7,684,000

Share Repurchase Programs - Add

Share Repurchase Programs - Additional Information (Detail) - USD ($)	Feb. 28, 2018	Dec. 31, 2017	Feb. 29, 2016
Equity [Abstract]
Common stock repurchase program, authorized amount	$ 50,000,000	$ 0	$ 50,000,000

Share Repurchase Programs - Sum

Share Repurchase Programs - Summary of Shares of Common Stock Repurchased Under Repurchase Programs (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended		36 Months Ended
	Dec. 31, 2018	Dec. 31, 2016	Dec. 31, 2018
Equity [Abstract]
Repurchase program, total number of shares purchased	641	1,891	2,532
Repurchase program, average price paid per share	$ 34.42	$ 26.43
Repurchase program, approximate dollar value of shares purchased	$ 22,069	$ 50,000	$ 72,069

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)
Commitments And Contingencies Disclosure [Abstract]
Other commitment, Performance bonds outstanding	$ 3,725,000
Number of months of salary paid as severance	From three to twenty-four months

Supplemental Financial Inform_3

Supplemental Financial Information - Summary of Additions and Deductions Related to Allowances for Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Allowance for doubtful accounts receivable, Beginning Balance	$ 10,158	$ 9,138	$ 11,872
Allowance for doubtful accounts receivable, Additions	4,776	5,245	2,452
Allowance for doubtful accounts receivable, Deductions	(4,472)	(4,225)	(5,186)
Allowance for doubtful accounts receivable, Ending Balance	$ 10,462	$ 10,158	$ 9,138

Cash Flows - Schedule of Cash P

Cash Flows - Schedule of Cash Payments for Interest on Indebtedness and Cash Payments for Taxes on Income (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental disclosures of cash flow information:
Cash paid during the year for interest	$ 10,155	$ 10,976	$ 3,782
Cash paid during the year for income taxes, net of refunds	$ 31,218	$ 55,470	$ 39,051

Cash Flows - Additional Informa

Cash Flows - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Supplemental Cash Flow Elements [Abstract]
Capital expenditures in accounts payable, purchased at period end but not yet paid	$ 1,170,000	$ 159,000	$ 791,000

Segment and Geographic Inform_3

Segment and Geographic Information - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018Segment
Segment Reporting [Abstract]
Number of operating segments	3
Description of major customers net sales	None of our clients exceeded ten percent of consolidated net sales in 2018, 2017 or 2016.

Segment and Geographic Inform_4

Segment and Geographic Information - Net Sales by Offering for North America, EMEA and APAC (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from External Customer [Line Items]
Revenues from external customers	$ 1,749,046	$ 1,747,726	$ 1,840,870	$ 1,742,494	$ 1,784,075	$ 1,757,973	$ 1,684,032	$ 1,477,543	$ 7,080,136	$ 6,703,623	$ 5,485,515
North America Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									5,362,981	5,181,734	3,971,828
EMEA Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									1,530,241	1,355,416	1,338,560
APAC Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									186,914	166,473	175,127
Hardware Net Sales [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									4,293,351
Hardware Net Sales [Member] | North America Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									3,610,356	3,352,355	2,454,889
Hardware Net Sales [Member] | EMEA Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									653,499	536,500	481,505
Hardware Net Sales [Member] | APAC Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									29,496	27,907	18,916
Software Net Sales [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									1,956,587
Software Net Sales [Member] | North America Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									1,112,715	1,310,118	1,146,808
Software Net Sales [Member] | EMEA Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									736,509	710,452	762,427
Software Net Sales [Member] | APAC Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									107,363	101,412	132,718
Services Net Sales [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									830,198
Services Net Sales [Member] | North America Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									639,910	519,261	370,131
Services Net Sales [Member] | EMEA Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									140,233	108,464	94,628
Services Net Sales [Member] | APAC Segment [Member]
Revenue from External Customer [Line Items]
Revenues from external customers									$ 50,055	$ 37,154	$ 23,493

Segment and Geographic Inform_5

Segment and Geographic Information - Financial Information about Reportable Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Total net sales	$ 1,749,046	$ 1,747,726	$ 1,840,870	$ 1,742,494	$ 1,784,075	$ 1,757,973	$ 1,684,032	$ 1,477,543	$ 7,080,136	$ 6,703,623	$ 5,485,515
Total costs of goods sold	1,494,882	1,512,812	1,576,493	1,502,231	1,551,192	1,531,892	1,432,653	1,269,316	6,086,418	5,785,053	4,742,413
Gross profit	254,164	234,914	264,377	240,263	232,883	226,081	251,379	208,227	993,718	918,570	743,102
Operating expenses:
Selling and administrative expenses	194,790	184,095	189,464	188,180	184,554	180,390	180,752	177,632	756,529	723,328	585,243
Severance and restructuring expenses	715	683	382	1,644	2,791	494	1,022	4,695	3,424	9,002	4,580
Loss on sale of foreign entity						3,646				3,646
Acquisition-related expenses		188	94			106	276	2,947	282	3,329	4,447
Earnings from operations	$ 58,659	$ 49,948	$ 74,437	$ 50,439	$ 45,538	$ 41,445	$ 69,329	$ 22,953	233,483	179,265	148,832
Products [Member]
Segment Reporting Information [Line Items]
Total net sales									6,249,938	6,038,744	4,997,263
Total costs of goods sold									5,711,400	5,512,402	4,571,462
Services [Member]
Segment Reporting Information [Line Items]
Total net sales									830,198	664,879	488,252
Total costs of goods sold									375,018	272,651	170,951
North America Segment [Member]
Segment Reporting Information [Line Items]
Total net sales									5,362,981	5,181,734	3,971,828
Total costs of goods sold									4,630,286	4,490,057	3,446,347
Gross profit									732,695	691,677	525,481
Operating expenses:
Selling and administrative expenses									545,091	530,792	401,316
Severance and restructuring expenses									1,617	4,010	2,966
Acquisition-related expenses									282	3,223	4,278
Earnings from operations									185,705	153,652	116,921
North America Segment [Member] | Products [Member]
Segment Reporting Information [Line Items]
Total net sales									4,723,071	4,662,473	3,601,697
Total costs of goods sold									4,313,070	4,253,587	3,301,148
North America Segment [Member] | Services [Member]
Segment Reporting Information [Line Items]
Total net sales									639,910	519,261	370,131
Total costs of goods sold									317,216	236,470	145,199
EMEA Segment [Member]
Segment Reporting Information [Line Items]
Total net sales									1,530,241	1,355,416	1,338,560
Total costs of goods sold									1,308,774	1,165,106	1,152,873
Gross profit									221,467	190,310	185,687
Operating expenses:
Selling and administrative expenses									182,470	164,305	160,269
Severance and restructuring expenses									1,677	4,888	1,496
Loss on sale of foreign entity										3,646
Acquisition-related expenses										106
Earnings from operations									37,320	17,365	23,922
EMEA Segment [Member] | Products [Member]
Segment Reporting Information [Line Items]
Total net sales									1,390,008	1,246,952	1,243,932
Total costs of goods sold									1,273,422	1,140,204	1,129,917
EMEA Segment [Member] | Services [Member]
Segment Reporting Information [Line Items]
Total net sales									140,233	108,464	94,628
Total costs of goods sold									35,352	24,902	22,956
APAC Segment [Member]
Segment Reporting Information [Line Items]
Total net sales									186,914	166,473	175,127
Total costs of goods sold									147,358	129,890	143,193
Gross profit									39,556	36,583	31,934
Operating expenses:
Selling and administrative expenses									28,968	28,231	23,658
Severance and restructuring expenses									130	104	118
Acquisition-related expenses											169
Earnings from operations									10,458	8,248	7,989
APAC Segment [Member] | Products [Member]
Segment Reporting Information [Line Items]
Total net sales									136,859	129,319	151,634
Total costs of goods sold									124,908	118,611	140,397
APAC Segment [Member] | Services [Member]
Segment Reporting Information [Line Items]
Total net sales									50,055	37,154	23,493
Total costs of goods sold									$ 22,450	$ 11,279	$ 2,796

Segment and Geographic Inform_6

Segment and Geographic Information - Summary of Total Assets by Reportable Operating Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ 2,775,947	$ 2,685,651
Operating Segments [Member] | North America Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	2,660,886	2,337,573
Operating Segments [Member] | EMEA Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	611,338	530,242
Operating Segments [Member] | APAC Segment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	98,959	101,169
Intersegment Eliminations [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total assets	$ (595,236)	$ (283,333)

Segment and Geographic Inform_7

Segment and Geographic Information - Summary of Geographic Net Sales and Long-Lived Assets (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales	$ 1,749,046	$ 1,747,726	$ 1,840,870	$ 1,742,494	$ 1,784,075	$ 1,757,973	$ 1,684,032	$ 1,477,543	$ 7,080,136	$ 6,703,623	$ 5,485,515
Total long-lived assets	72,954				75,252				72,954	75,252
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									5,100,456	4,933,805	3,776,352
Total long-lived assets	52,346				50,462				52,346	50,462
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									843,145	684,632	671,999
Total long-lived assets	12,434				14,783				12,434	14,783
Other Foreign [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales									1,136,535	1,085,186	$ 1,037,164
Total long-lived assets	$ 8,174				$ 10,007				$ 8,174	$ 10,007

Segment and Geographic Inform_8

Segment and Geographic Information - Pre-Tax Depreciation and Amortization by Operating Segment (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting Information [Line Items]
Depreciation and amortization of property and equipment	$ 21,721	$ 25,787	$ 27,493
Amortization of intangible assets	15,737	16,812	10,637
Depreciation and amortization, total	37,458	42,599	38,130
North America Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of property and equipment	17,164	20,241	21,952
Amortization of intangible assets	14,791	15,971	8,139
EMEA Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of property and equipment	4,058	5,025	4,908
Amortization of intangible assets	285	73	1,951
APAC Segment [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization of property and equipment	499	521	633
Amortization of intangible assets	$ 661	$ 768	$ 547

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($)	Aug. 01, 2018	Sep. 26, 2017	Jan. 06, 2017	Sep. 01, 2016	Dec. 31, 2017	Jun. 30, 2017	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Acquisitions, net of cash and cash equivalents acquired								$ 74,938,000	$ 186,932,000	$ 10,297,000
Goodwill					$ 131,431,000			166,841,000	131,431,000
Amortization expense								15,737,000	16,812,000	10,637,000
Reduction in goodwill balance due to adjustment in purchase price allocation						$ 945,000			0
North America Segment [Member]
Business Acquisition [Line Items]
Goodwill					119,828,000			156,268,000	119,828,000
Amortization expense								$ 14,791,000	$ 15,971,000	8,139,000
Business acquisition, effective date of acquisition								Aug. 1, 2018	Jan. 6, 2017
EMEA Segment [Member]
Business Acquisition [Line Items]
Goodwill					4,041,000			$ 3,749,000	$ 4,041,000
Amortization expense								285,000	$ 73,000	1,951,000
Business acquisition, effective date of acquisition									Sep. 26, 2017
APAC Segment [Member]
Business Acquisition [Line Items]
Goodwill					7,562,000			6,824,000	$ 7,562,000
Amortization expense								$ 661,000	768,000	$ 547,000
Business acquisition, effective date of acquisition										Sep. 1, 2016
Cardinal Solutions Group, Inc [Member]
Business Acquisition [Line Items]
Acquisition, percentage of issued and outstanding shares acquired	100.00%
Acquisitions, net of cash and cash equivalents acquired	$ 78,800,000
Acquisition, working capital and estimated tax adjustments	$ 3,800,000
Business acquisition, effective date of acquisition	Aug. 1, 2018
Cardinal Solutions Group, Inc [Member] | North America Segment [Member]
Business Acquisition [Line Items]
Net assets acquired	$ 42,360,000
Identifiable intangible assets	27,540,000
Goodwill	$ 36,440,000
Cardinal Solutions Group, Inc [Member] | North America Segment [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Estimated useful life of acquired intangible assets	10 years
Caase Group, B.V. [Member]
Business Acquisition [Line Items]
Acquisitions, net of cash and cash equivalents acquired		$ 6,038,000
Business acquisition, effective date of acquisition		Sep. 26, 2017
Caase Group, B.V. [Member] | EMEA Segment [Member]
Business Acquisition [Line Items]
Net assets acquired		$ 2,107,000
Goodwill					4,041,000				4,041,000
Cash acquired		68,000
Acquired identifiable intangible assets		2,039,000
Decrease in fair value of acquired identifiable intangible assets					$ 193,000
Tax deductible goodwill		0
Caase Group, B.V. [Member] | EMEA Segment [Member] | Scenario, Previously Reported [Member]
Business Acquisition [Line Items]
Goodwill		$ 4,117,000
Caase Group, B.V. [Member] | EMEA Segment [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Estimated useful life of acquired intangible assets		8 years
Caase Group, B.V. [Member] | EMEA Segment [Member] | Trade Name [Member]
Business Acquisition [Line Items]
Estimated useful life of acquired intangible assets		8 years
Caase Group, B.V. [Member] | EMEA Segment [Member] | Non-compete Agreements [Member]
Business Acquisition [Line Items]
Estimated useful life of acquired intangible assets		8 years
Datalink [Member]
Business Acquisition [Line Items]
Acquisitions, net of cash and cash equivalents acquired			$ 257,456,000
Identifiable intangible assets			94,500,000
Goodwill			64,140,000
Cash acquired			76,597,000
Tax deductible goodwill			0
Estimated fair value of deferred revenue			65,500,000
Estimated fair value of deferred costs			$ 48,029,000
Amortization expense									11,520,000
Business combination, net sales from acquired entity									524,281,000
Business combination, gross profit from acquired entity									$ 118,917,000
Business acquisition, effective date of acquisition			Jan. 6, 2017
Datalink [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Identifiable intangible assets			$ 92,200,000
Datalink [Member] | Trade Name [Member]
Business Acquisition [Line Items]
Identifiable intangible assets			2,200,000
Datalink [Member] | Non-compete Agreements [Member]
Business Acquisition [Line Items]
Identifiable intangible assets			100,000
Datalink [Member] | North America Segment [Member]
Business Acquisition [Line Items]
Goodwill			$ 64,140,000
Ignia Pty Ltd [Member]
Business Acquisition [Line Items]
Acquisitions, net of cash and cash equivalents acquired				$ 10,804,000
Business acquisition, effective date of acquisition				Sep. 1, 2016
Ignia Pty Ltd [Member] | APAC Segment [Member]
Business Acquisition [Line Items]
Acquisitions, net of cash and cash equivalents acquired				$ 10,804,000
Net assets acquired				5,324,000
Goodwill							$ 6,957,000			$ 6,957,000
Cash acquired				1,463,000
Acquired identifiable intangible assets				4,716,000
Decrease in fair value of acquired identifiable intangible assets							$ 218,000
Tax deductible goodwill						$ 0
Business acquisition, effective date of acquisition								Sep. 1, 2016
Ignia Pty Ltd [Member] | APAC Segment [Member] | Scenario, Previously Reported [Member]
Business Acquisition [Line Items]
Goodwill				$ 7,248,000
Ignia Pty Ltd [Member] | APAC Segment [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Estimated useful life of acquired intangible assets				8 years
Ignia Pty Ltd [Member] | APAC Segment [Member] | Restrictive Covenant Agreements [Member]
Business Acquisition [Line Items]
Estimated useful life of acquired intangible assets				27 months

Acquisitions - Summary of Purch

Acquisitions - Summary of Purchase Price and Estimated Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($)	Jan. 06, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Total purchase price		$ 74,938,000	$ 186,932,000	$ 10,297,000
Fair value of net assets acquired:
Excess purchase price over fair value of net assets acquired (“goodwill”)		$ 166,841,000	$ 131,431,000
Datalink [Member]
Business Acquisition [Line Items]
Total purchase price	$ 257,456,000
Fair value of net assets acquired:
Current assets	238,577,000
Identifiable intangible assets	94,500,000
Property and equipment	5,843,000
Other assets	17,888,000
Current liabilities	(129,071,000)
Long-term liabilities, including deferred taxes	(34,421,000)
Total fair value of net assets acquired	193,316,000
Excess purchase price over fair value of net assets acquired (“goodwill”)	$ 64,140,000

Acquisitions - Estimated Useful

Acquisitions - Estimated Useful Lives of Identifiable Intangibles (Detail) - Datalink [Member]	12 Months Ended
	Dec. 31, 2018
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	10 years
Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	1 year
Non-compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Useful Life	1 year

Acquisitions - Summary of Pro F

Acquisitions - Summary of Pro Forma Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net sales, As reported	$ 1,749,046	$ 1,747,726	$ 1,840,870	$ 1,742,494	$ 1,784,075	$ 1,757,973	$ 1,684,032	$ 1,477,543	$ 7,080,136	$ 6,703,623	$ 5,485,515
Net earnings, As reported	$ 47,041	$ 32,154	$ 51,479	$ 33,003	$ 14,168	$ 22,412	$ 40,255	$ 13,848	$ 163,677	$ 90,683	$ 84,690
Diluted earnings per share, As reported	$ 1.31	$ 0.89	$ 1.44	$ 0.91	$ 0.39	$ 0.62	$ 1.11	$ 0.38	$ 4.55	$ 2.50	$ 2.32
Datalink [Member]
Business Acquisition [Line Items]
Net sales, As reported										$ 6,703,623	$ 5,485,515
Net sales, Proforma										6,707,533	6,084,484
Net earnings, As reported										90,683	84,690
Net earnings, Proforma										$ 92,276	$ 85,823
Diluted earnings per share, As reported										$ 2.50	$ 2.32
Diluted earnings per share, Proforma										$ 2.55	$ 2.36

Sale of Foreign Entity - Additi

Sale of Foreign Entity - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2017	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of foreign entity	$ 3,646,000	$ 3,646,000
Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss on sale of foreign entity	3,646,000
Charge upon release of cumulative translation adjustment	$ 2,903,000

Selected Quarterly Financial _3

Selected Quarterly Financial Information - Consolidated Quarterly Financial Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues from external customers	$ 1,749,046	$ 1,747,726	$ 1,840,870	$ 1,742,494	$ 1,784,075	$ 1,757,973	$ 1,684,032	$ 1,477,543	$ 7,080,136	$ 6,703,623	$ 5,485,515
Costs of goods sold	1,494,882	1,512,812	1,576,493	1,502,231	1,551,192	1,531,892	1,432,653	1,269,316	6,086,418	5,785,053	4,742,413
Gross profit	254,164	234,914	264,377	240,263	232,883	226,081	251,379	208,227	993,718	918,570	743,102
Operating expenses:
Selling and administrative expenses	194,790	184,095	189,464	188,180	184,554	180,390	180,752	177,632	756,529	723,328	585,243
Severance and restructuring expenses	715	683	382	1,644	2,791	494	1,022	4,695	3,424	9,002	4,580
Loss on sale of foreign entity						3,646				3,646
Acquisition-related expenses		188	94			106	276	2,947	282	3,329	4,447
Earnings from operations	58,659	49,948	74,437	50,439	45,538	41,445	69,329	22,953	233,483	179,265	148,832
Non-operating (income) expense:
Interest income	(422)	(330)	(170)	(153)	(346)	(227)	(205)	(431)	(1,075)	(1,209)	(1,066)
Interest expense	5,563	6,132	5,102	6,015	5,360	5,555	4,326	3,933	22,812	19,174	8,628
Net foreign currency exchange (gain) loss	(1,517)	539	(275)	(245)	(117)	341	251	380	(1,498)	855	522
Other expense, net	323	393	324	302	367	339	326	315	1,342	1,347	1,290
Earnings before income taxes	54,712	43,214	69,456	44,520	40,274	35,437	64,631	18,756	211,902	159,098	139,458
Income tax expense	7,671	11,060	17,977	11,517	26,106	13,025	24,376	4,908	48,225	68,415	54,768
Net earnings	$ 47,041	$ 32,154	$ 51,479	$ 33,003	$ 14,168	$ 22,412	$ 40,255	$ 13,848	$ 163,677	$ 90,683	$ 84,690
Net earnings per share:
Basic	$ 1.33	$ 0.91	$ 1.45	$ 0.92	$ 0.40	$ 0.63	$ 1.13	$ 0.39	$ 4.60	$ 2.54	$ 2.35
Diluted	$ 1.31	$ 0.89	$ 1.44	$ 0.91	$ 0.39	$ 0.62	$ 1.11	$ 0.38	$ 4.55	$ 2.50	$ 2.32
Shares used in per share calculations:
Basic	35,480	35,468	35,483	35,913	35,809	35,787	35,765	35,602	35,586	35,741	36,102
Diluted	35,999	35,957	35,815	36,263	36,272	36,203	36,169	36,185	36,009	36,207	36,438

Selected Quarterly Financial _4

Selected Quarterly Financial Information - Consolidated Quarterly Financial Information (Parenthetical) (Detail) - USD ($)	3 Months Ended								6 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on net sales	$ 1,749,046,000	$ 1,747,726,000	$ 1,840,870,000	$ 1,742,494,000	$ 1,784,075,000	$ 1,757,973,000	$ 1,684,032,000	$ 1,477,543,000		$ 7,080,136,000	$ 6,703,623,000	$ 5,485,515,000
Effect of error revision on cost of goods sold	$ 1,494,882,000	$ 1,512,812,000	$ 1,576,493,000	$ 1,502,231,000	$ 1,551,192,000	$ 1,531,892,000	$ 1,432,653,000	$ 1,269,316,000		$ 6,086,418,000	$ 5,785,053,000	$ 4,742,413,000
Effect of error revision on diluted earnings per share	$ 1.31	$ 0.89	$ 1.44	$ 0.91	$ 0.39	$ 0.62	$ 1.11	$ 0.38		$ 4.55	$ 2.50	$ 2.32
Software Revenue Transactions [Member] | Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on gross profit, earnings from operations and net earnings				$ 258,000
Effect of error revision on diluted earnings per share				$ 0.01
Software Revenue Transactions [Member] | Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on gross profit, earnings from operations and net earnings			$ 0						$ 258,000
Effect of error revision on diluted earnings per share			$ 0						$ 0
Products [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on net sales										$ 6,249,938,000	$ 6,038,744,000	$ 4,997,263,000
Effect of error revision on cost of goods sold										5,711,400,000	5,512,402,000	4,571,462,000
Products [Member] | Software Revenue Transactions [Member] | Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on net sales				$ (24,364,000)
Effect of error revision on cost of goods sold				(23,749,000)
Products [Member] | Software Revenue Transactions [Member] | Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on net sales			$ (949,000)						$ (25,313,000)
Effect of error revision on cost of goods sold			(532,000)						(24,281,000)
Services [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on net sales										830,198,000	664,879,000	488,252,000
Effect of error revision on cost of goods sold										$ 375,018,000	$ 272,651,000	$ 170,951,000
Services [Member] | Software Revenue Transactions [Member] | Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on net sales				3,953,000
Effect of error revision on cost of goods sold				$ 3,080,000
Services [Member] | Software Revenue Transactions [Member] | Restatement Adjustment [Member]
Error Corrections And Prior Period Adjustments Restatement [Line Items]
Effect of error revision on net sales			4,900,000						8,853,000
Effect of error revision on cost of goods sold			$ 4,483,000						$ 7,563,000