Noncontrolling Interest - Company's Ownership Percentage of its Majority Owned Operating Segments and Related Noncontrolling Interest (Detail) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Dec. 31, 2015
Noncontrolling Interest [Line Items]    
Noncontrolling interest $ 36,227 $ 46,219
Ergobaby    
Noncontrolling Interest [Line Items]    
Noncontrolling interest 17,786 $ 17,754
Ergobaby | % Ownership Primary    
Noncontrolling Interest [Line Items]    
% Ownership [1]   81.00%
Ergobaby | % Ownership Fully Diluted    
Noncontrolling Interest [Line Items]    
% Ownership [1]   74.20%
Liberty    
Noncontrolling Interest [Line Items]    
Proceeds from Stock Options Exercised 3,800  
Noncontrolling interest $ 2,498 $ 2,934
Liberty | % Ownership Primary    
Noncontrolling Interest [Line Items]    
% Ownership [1] 88.60% 96.20%
Liberty | % Ownership Fully Diluted    
Noncontrolling Interest [Line Items]    
% Ownership [1] 84.70% 84.60%
Manitoba Harvest    
Noncontrolling Interest [Line Items]    
Noncontrolling interest $ 13,677 $ 14,071
Manitoba Harvest | % Ownership Primary    
Noncontrolling Interest [Line Items]    
% Ownership [1] 76.60% 76.60%
Manitoba Harvest | % Ownership Fully Diluted    
Noncontrolling Interest [Line Items]    
% Ownership [1] 66.70% 65.60%
ACI    
Noncontrolling Interest [Line Items]    
Noncontrolling interest $ (11,835) $ 4,295
ACI | % Ownership Primary    
Noncontrolling Interest [Line Items]    
% Ownership [1] 69.40% 69.40%
ACI | % Ownership Fully Diluted    
Noncontrolling Interest [Line Items]    
% Ownership [1] 69.30% 69.30%
Arnold Magnetics    
Noncontrolling Interest [Line Items]    
Noncontrolling interest $ 2,173 $ 2,113
Arnold Magnetics | % Ownership Primary    
Noncontrolling Interest [Line Items]    
% Ownership [1] 96.70% 96.70%
Arnold Magnetics | % Ownership Fully Diluted    
Noncontrolling Interest [Line Items]    
% Ownership [1] 84.70% 87.30%
Clean Earth    
Noncontrolling Interest [Line Items]    
Noncontrolling interest $ 5,072 $ 4,308
Clean Earth | % Ownership Primary    
Noncontrolling Interest [Line Items]    
% Ownership [1] 97.50% 97.50%
Clean Earth | % Ownership Fully Diluted    
Noncontrolling Interest [Line Items]    
% Ownership [1] 79.80% 86.20%
Sterno Candle Lamp    
Noncontrolling Interest [Line Items]    
Noncontrolling interest $ 1,116 $ 644
Sterno Candle Lamp | % Ownership Primary    
Noncontrolling Interest [Line Items]    
% Ownership [1] 100.00% 100.00%
Sterno Candle Lamp | % Ownership Fully Diluted    
Noncontrolling Interest [Line Items]    
% Ownership [1] 89.70% 89.70%
Allocation Interests    
Noncontrolling Interest [Line Items]    
Noncontrolling interest $ 100 $ 100
[1] The principal difference between primary and diluted percentages of our operating segments is due to stock option issuances of operating segment stock to management of the respective businesses.