Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Net sales	$ 585,900	$ 546,441
Cost of sales	419,827	392,820
Gross profit	166,073	153,621
Selling and administrative expenses	132,532	122,623
Operating income	33,541	30,998
Interest and other non-operating expenses, net	3,527	3,647
Income before income taxes and equity earnings	30,014	27,351
(Benefit) provision for income taxes	(1,279)	5,119
Equity earnings in unconsolidated investments, net	46	38
Net income	31,339	22,270
Net loss attributable to redeemable noncontrolling interest	0	11
Net income attributable to Pool Corporation	$ 31,339	$ 22,281
Earnings per share:
Basic (in dollars per share)	$ 0.78	$ 0.54
Diluted (in dollars per share)	$ 0.75	$ 0.52
Weighted average shares outstanding: [Abstract]
Basic (in shares)	40,370	41,192
Diluted (in shares)	41,862	42,877
Cash dividends declared per common share	$ 0.37	$ 0.31