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Summary of Disaggregated Revenue (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
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Dec. 31, 2018 | [1] | Sep. 30, 2018 | [1] | Jun. 30, 2018 | [1] | Mar. 31, 2018 | [1] | Dec. 31, 2017 | [1] | Sep. 30, 2017 | [1] | Jun. 30, 2017 | [1] | Mar. 31, 2017 | [1] | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from product lines, percentage |  |  |  |  |  |  |  |  | 100.00% | 100.00% | 100.00%
Revenues | $ 991,326 | $ 1,296,007 | $ 1,332,743 | $ 926,577 | $ 964,345 | $ 1,229,591 | $ 1,275,924 | $ 872,095 | $ 4,546,653 | $ 4,341,955 | $ 4,220,702
United States |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 4,126,639 | 3,919,684 | 3,813,204
Canada |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 291,685 | 269,603 | 267,220
Mexico |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 128,329 | $ 152,668 | $ 140,278
HVAC Equipment |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from product lines, percentage |  |  |  |  |  |  |  |  | 67.00% | 67.00% | 66.00%
Other HVAC Products |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from product lines, percentage |  |  |  |  |  |  |  |  | 29.00% | 28.00% | 29.00%
Commercial Refrigeration Products |  |  |  |  |  |  |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues from product lines, percentage |  |  |  |  |  |  |  |  | 4.00% | 5.00% | 5.00%
[1] | Sales of residential central air conditioners, heating equipment and parts and supplies are seasonal. Demand related to the residential central air conditioning replacement market is typically highest in the second and third quarters, and demand for heating equipment is usually highest in the fourth quarter. Demand related to the new construction sectors throughout most of the markets is fairly evenly distributed throughout the year except for dependence on housing completions and related weather and economic conditions.

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