Quarterly Financial Information (unaudited) (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended			3 Months Ended			12 Months Ended		3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Jun. 30, 2012 Hearth [Member]	Mar. 31, 2012 Hearth [Member]	Dec. 31, 2011 Hearth [Member]	Dec. 31, 2012 Lease Termination [Member]	Dec. 31, 2011 Lease Termination [Member]	Mar. 31, 2012 Lease Termination [Member] Regional Distribution Network [Member]	Dec. 31, 2012 Lease Termination [Member] Regional Distribution Network [Member]	Sep. 30, 2012 Goodwill in assets of discontinued operations [Member] Service Experts [Member]	Dec. 31, 2012 Goodwill in assets of discontinued operations [Member] Service Experts [Member]
Pre-tax charge for write-down of net assets to estimated fair market value									$ 6.3
Restructuring charges	1.2	8.0	1.0	2.3	4.2	12.5	11.4				2.4	4.1	2.6	2.7
Settlement charge related to recognized actuarial losses								6.3
Discontinued operation in settlement of foreign currency translation								3.5
Impairment of goodwill	7.6									7.6					20.5	20.5
Working capital adjustment included in net proceeds from sale of discontinued operations								2.9
Impairment of assets	$ 6.7				$ 0	$ 0.2	$ 0