Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net sales	$ 1,057,804	$ 988,163	$ 1,643,704	$ 1,534,603
Cost of sales	749,149	698,499	1,168,976	1,091,318
Gross profit	308,655	289,664	474,728	443,285
Selling and administrative expenses	146,613	135,478	279,145	258,101
Operating income	162,042	154,186	195,583	185,184
Interest and other non-operating expenses, net	5,991	3,952	9,518	7,599
Income before income taxes and equity earnings	156,051	150,234	186,065	177,585
Provision for income taxes	39,062	55,654	37,783	60,772
Equity earnings in unconsolidated investments, net	60	40	106	78
Net income	117,049	94,620	148,388	116,891
Net loss attributable to noncontrolling interest	0	283	0	294
Net income attributable to Pool Corporation	$ 117,049	$ 94,903	$ 148,388	$ 117,185
Earnings per share:
Basic (in dollars per share)	$ 2.89	$ 2.30	$ 3.67	$ 2.84
Diluted (in dollars per share)	$ 2.80	$ 2.21	$ 3.55	$ 2.73
Weighted average shares outstanding: [Abstract]
Basic (in shares)	40,453	41,349	40,413	41,271
Diluted (in shares)	41,814	42,985	41,840	42,937
Cash dividends declared per common share	$ 0.45	$ 0.37	$ 0.82	$ 0.68