Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Jan. 01, 2018
Sale Leaseback Transaction [Line Items]
Revenue recognized under the percentage-of-completion method		28.00%	25.80%
Advertising costs		$ 4,900,000	$ 5,100,000	$ 4,700,000
Research and development cost		2,900,000	2,200,000	900,000
Net cash provided by operating activities		70,070,000	123,987,000	87,221,000
Net cash (used in) provided by financing activities		(2,598,000)	1,348,000	(721,000)
Selling, General and Administrative Expense		$ (143,448,000)	$ (161,099,000)	$ (133,381,000)
Minimum | Land, Buildings and Improvements
Sale Leaseback Transaction [Line Items]
Estimated useful lives		15 years
Minimum | Machinery and Equipment
Sale Leaseback Transaction [Line Items]
Estimated useful lives		3 years
Maximum | Land, Buildings and Improvements
Sale Leaseback Transaction [Line Items]
Estimated useful lives		40 years
Maximum | Machinery and Equipment
Sale Leaseback Transaction [Line Items]
Estimated useful lives		20 years
Residential Products | Home Improvement Retail Company | Accounts Receivable
Sale Leaseback Transaction [Line Items]
Concentrations of credit risk		13.60%	13.70%
Residential Products | Home Improvement Retail Company | Net sales
Sale Leaseback Transaction [Line Items]
Concentrations of credit risk		12.00%	11.00%	11.00%
First quarter 2015 Sale Leaseback
Sale Leaseback Transaction [Line Items]
Sale price	$ 26,400,000
Period of lease	5 years
Net present value of future minimum lease payments	$ 5,800,000
Deferred gain on sale	13,100,000
Gain above minimum lease payments fair value	7,400,000
Minimum lease payment for first year	1,378,000,000
Minimum lease payments year 2	1,378,000,000
Minimum lease payments year 3	1,378,000,000
Minimum lease payments year 4	1,378,000,000
Minimum lease payments year 5	$ 1,378,000,000
Accounting Standards Update 2016-09
Sale Leaseback Transaction [Line Items]
Net cash provided by operating activities			$ 1,249,000	$ 537,000
Net cash (used in) provided by financing activities			1,249,000	573,000
Accounting Standards Update 2016-09 | Additional Paid-In Capital
Sale Leaseback Transaction [Line Items]
Cumulative effect of new accounting principle in period of adoption			254,000
Subsequent Event | Accounting Standards Update 2014-09
Sale Leaseback Transaction [Line Items]
Cumulative effect of new accounting principle in period of adoption					$ 750,000
Pro Forma | Accounting Standards Update 2017-07
Sale Leaseback Transaction [Line Items]
Selling, General and Administrative Expense			524,000	647,000
Other Expenses			$ 524,000	$ 647,000