Acquisitions (Details)	Dec. 31, 2018 store
Business Acquisition [Line Items]
Number of sales centers	364
Tore Pty. Ltd. (Pool Power) [Member]
Business Acquisition [Line Items]
Number of sales centers	1
Lincoln Equipment, Inc. (Lincoln Aquatics) [Member]
Business Acquisition [Line Items]
Number of sales centers	1
New Star Holdings Pty. Ltd. [Member]
Business Acquisition [Line Items]
Number of sales centers	1
E-Grupa [Member]
Business Acquisition [Line Items]
Number of sales centers	1
Kripsol Intermark Malaga S.L. (Intermark) [Member]
Business Acquisition [Line Items]
Number of sales centers	1
Chem Quip, Inc. [Member]
Business Acquisition [Line Items]
Number of sales centers	5
Metro Irrigation Supply Company Ltd. [Member]
Business Acquisition [Line Items]
Number of sales centers	8
Virginia | Turf & Garden Inc. [Member]
Business Acquisition [Line Items]
Number of sales centers	3
North Carolina | Turf & Garden Inc. [Member]
Business Acquisition [Line Items]
Number of sales centers	1