Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2020	Oct. 26, 2020
Cover [Abstract]
Document Type	10-Q
Document Period End Date	Sep. 30, 2020
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	0-26640
Entity Registrant Name	POOL CORPORATION
Entity Central Index Key	0000945841
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	36-3943363
Entity Address, Address Line One	109 Northpark Boulevard,
Entity Address, City or Town	Covington,
Entity Address, State or Province	LA
Entity Address, Postal Zip Code	70433-5001
City Area Code	(985)
Local Phone Number	892-5521
Title of 12(b) Security	Common Stock, par value $0.001 per share
Trading Symbol	POOL
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		40,158,582