Reportable Business Segments (Capital Expenditures by Segment) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total capital expenditures	$ 84,300,000	$ 69,900,000	$ 88,400,000
New capital leases	0	0	0
Residential Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total capital expenditures	36,700,000	28,100,000	39,400,000
Commercial Heating and Cooling [Member]
Segment Reporting Information [Line Items]
Total capital expenditures	11,500,000	8,600,000	14,100,000
Refrigeration [Member]
Segment Reporting Information [Line Items]
Total capital expenditures	12,100,000	11,400,000	15,800,000
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Total capital expenditures	$ 24,000,000	$ 21,800,000	$ 19,100,000