Acquisitions (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Business Acquisition [Line Items]
Number of sales centers	328
Controlling Interest by parent	60.00%
Ideal Distributors Ltd. [Member]
Business Acquisition [Line Items]
Number of sales centers	4
CCR Distribution [Member]
Business Acquisition [Line Items]
Number of sales centers	1
B. Shapiro Supply, LLC [Member]
Business Acquisition [Line Items]
Number of sales centers	1
SPSC, Inc. [Member]
Business Acquisition [Line Items]
Number of sales centers	1
Atlantic Chemical & Aquatics Inc. [Member]
Business Acquisition [Line Items]
Number of sales centers	2
DFW Stone Supply, LLC [Member]
Business Acquisition [Line Items]
Number of sales centers	2
Pool Systems Pty. Ltd. [Member]
Business Acquisition [Line Items]
Contingent consideration, PSL	0.2
Number of sales centers	3
Controlling Interest by parent	60.00%
St. Louis Hardscape Material & Supply, LLC [Member]
Business Acquisition [Line Items]
Number of sales centers	1