Summary of Significant Accounting Policies (Tables)

12 Months Ended

Nov. 30, 2019

New Accounting Pronouncements Or Change In Accounting Principle [Line Items]

Schedule of Ranges of Estimated Useful Lives For Property and Equipment

The ranges of estimated useful lives for property and equipment categories are as follows:

Equipment and Furniture		3 - 10 years
Software		3 - 7 years
Leasehold improvements		2 - 15 years
Buildings and building improvements		10 - 40 years

Schedule of Amortizable Intangible Assets

Intangible assets consist primarily of customer relationships and lists, vendor lists, technology and trade names. Amortization is based on the pattern in which the economic benefits of the intangible assets will be consumed or on a straight line basis when the consumption pattern is not apparent over the following useful lives:

Customer relationships and lists		4 - 15 years
Vendor lists		10 years
Technology		5 years
Other intangible assets		1- 10 years

Accounting Standards Update 2014-09

New Accounting Pronouncements Or Change In Accounting Principle [Line Items]

Effects of Adoption on Consolidated Balance Sheet, Consolidated Statements of Operations and Cash Flows

The effects of adoption on the Company’s Consolidated Balance Sheet as of November 30, 2018, the Company’s Consolidated Statements of Operations and the Consolidated Statements of Cash Flows for fiscal years 2018 and 2017 were as follows:

	As of November 30, 2018
Consolidated Balance Sheet Caption	As reported		Adjustments for ASC Topic 606			As adjusted
Assets
Accounts receivable, net⁽¹⁾	$	3,855,431	$	(215,000	)	$	3,640,431
Receivables from vendors, net		—		351,744			351,744
Inventories		2,518,319		(125,760	)		2,392,559
Other current assets⁽¹⁾		261,536		52,080			313,616
Liabilities and Stockholders' Equity
Other accrued liabilities	$	613,449	$	59,186		$	672,635
Deferred tax liabilities		206,024		892			206,916
Retained earnings		2,195,635		2,986			2,198,621

⁽¹⁾

^{Amounts “As adjusted” may not agree to the Consolidated Balance Sheet due to other reclassifications to conform to current period presentation.}

	Year Ended November 30, 2018									Year Ended November 30, 2017
Consolidated Statements of Operations	As reported			Adjustments for ASC Topic 606			As adjusted			As reported			Adjustments for ASC Topic 606			As adjusted
Revenue:
Products	$	17,608,897		$	(285,819	)	$	17,323,078		$	15,070,871		$	(274,572	)	$	14,796,299
Services		2,444,867			—			2,444,867			1,974,829			—			1,974,829
Total revenue		20,053,764			(285,819	)		19,767,945			17,045,700			(274,572	)		16,771,128
Cost of revenue:
Products		(16,611,595	)		285,019			(16,326,576	)		(14,262,094	)		272,944			(13,989,150	)
Services		(1,514,470	)		—			(1,514,470	)		(1,232,666	)		—			(1,232,666	)
Gross profit		1,927,699			(800	)		1,926,899			1,550,940			(1,628	)		1,549,312
Selling, general and administrative expenses		(1,376,664	)		—			(1,376,664	)		(1,041,975	)		—			(1,041,975	)
Operating income		551,036			(800	)		550,236			508,965			(1,628	)		507,337
Interest expense and finance charges, net		(84,675	)		—			(84,675	)		(45,357	)		—			(45,357	)
Other income (expense), net		(8,984	)		—			(8,984	)		1,123			—			1,123
Income before income taxes		457,377			(800	)		456,577			464,731			(1,628	)		463,103
Provision for income taxes		(156,779	)		183			(156,596	)		(163,558	)		695			(162,863	)
Net income	$	300,598		$	(617	)	$	299,981		$	301,173		$	(933	)	$	300,240
Earnings per common share:
Basic	$	7.23		$	(0.02	)	$	7.21		$	7.54		$	(0.02	)	$	7.52
Diluted	$	7.19		$	(0.02	)	$	7.17		$	7.51		$	(0.03	)	$	7.48

	Year Ended November 30, 2018
Consolidated Statement of Cash Flows Caption	As reported			Adjustments for ASC Topic 606			As adjusted
Cash flows from operating activities:
Net income	$	300,598		$	(617	)	$	299,981
Adjustments to reconcile net income to cash provided by operating activities:
Deferred income taxes		(46,888	)		(184	)		(47,072	)
Changes in operating assets and liabilities, net of acquisition of businesses:
Accounts receivables, net		(512,984	)		61,796			(451,188	)
Receivables from vendors, net		—			(63,831	)		(63,831	)
Inventories		(367,899	)		1,507			(366,392	)
Other operating assets and liabilities		94,138			1,329			95,466
Net cash provided by operating activities		100,706			—			100,706

	Year Ended November 30, 2017
Consolidated Statement of Cash Flows Caption	As reported			Adjustments for ASC Topic 606			As adjusted
Cash flows from operating activities:
Net income	$	301,173		$	(933	)	$	300,240
Adjustments to reconcile net income to cash provided by operating activities:
Deferred income taxes		(25,221	)		(695	)		(25,916	)
Changes in operating assets and liabilities, net of acquisition of businesses:
Accounts receivables, net		(478,273	)		101,902			(376,371	)
Receivables from vendors, net		—			(83,477	)		(83,477	)
Inventories		(243,332	)		(18,091	)		(261,423	)
Other operating assets and liabilities		99,160			1,294			100,454
Net cash provided by operating activities		176,764			—			176,764