Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net sales	$ 2,788,188	$ 2,570,803	$ 2,363,139
Cost of sales	1,982,899	1,829,716	1,687,495
Gross profit	805,289	741,087	675,644
Selling and administrative expenses	520,918	485,228	459,422
Operating income	284,371	255,859	216,222
Interest and other non-operating expenses, net	(15,189)	(14,481)	(8,072)
Income before income taxes and equity earnings	269,182	241,378	208,150
Provision for income taxes	77,982	92,931	80,137
Equity earnings in unconsolidated investments, net	139	156	211
Net income	191,339	148,603	128,224
Net loss attributable to noncontrolling interest	294	352	51
Net income attributable to Pool Corporation	$ 191,633	$ 148,955	$ 128,275
Earnings per share:
Basic (in dollars per share)	$ 4.69	$ 3.56	$ 2.98
Diluted (in dollars per share)	$ 4.51	$ 3.47	$ 2.90
Weighted average shares outstanding:
Basic (in shares)	40,838	41,872	43,105
Diluted (in shares)	42,449	42,984	44,254
Cash dividends declared per common share (in dollars per share)	$ 1.42	$ 1.19	$ 1.00