Goodwill and Other Intangible Assets Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets [Line Items]
Other intangible assets, net	$ 12,004	$ 13,223
Total other intangible assets, gross	16,394	16,610
Amortization of Intangible Assets	1,100	976	$ 1,012
Other intangible assets, future amortization expense [Abstract]
2019	953
2020	866
2021	298
2022	108
2023	75
National Pool Tile (NPT) tradename
Intangible Assets [Line Items]
Intangibles Gross	1,500	1,500
Accumulated Amortization	(812)	(738)
Intangibles Net	$ 688	762
Weighted Average Useful Life	20 years
Non-compete agreements
Intangible Assets [Line Items]
Intangibles Gross	$ 5,019	5,078
Accumulated Amortization	(3,157)	(2,243)
Intangibles Net	$ 1,862	2,835
Weighted Average Useful Life	4 years 10 months 20 days
Patents
Intangible Assets [Line Items]
Intangibles Gross	$ 473	523
Accumulated Amortization	(421)	(406)
Intangibles Net	$ 52	117
Weighted Average Useful Life	5 years
Intangible assets
Intangible Assets [Line Items]
Accumulated Amortization	$ (4,390)	(3,387)
Horizon tradename
Intangible Assets [Line Items]
Acquired Indefinite-lived Intangibles	8,400	8,400
Pool Systems tradename and trademarks
Intangible Assets [Line Items]
Acquired Indefinite-lived Intangibles	$ 1,002	$ 1,109