Fair Value Measurement - Summary of Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (Detail) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Liabilities:              
Put option of noncontrolling shareholders         $ (50,000)    
Contingent consideration         (3,780,000) $ (1,500,000) [1]  
Total recorded at fair value $ (4,930,000)   $ (4,930,000)   $ (1,550,000) $ (1,550,000) $ (50,000)
Gain on sale of discontinued operations, net of income tax 2,134,000 $ 151,075,000 2,134,000 $ 151,075,000      
Fair Value Measurements Recurring [Member] | Carrying Value [Member]              
Assets:              
Equity method investment - FOX 197,742,000   197,742,000        
Interest rate cap             249,747,000
Liabilities:              
Call option of noncontrolling shareholder [2] (50,000)   (50,000)        
Put option of noncontrolling shareholders (50,000) [1]   (50,000) [1]       (50,000)
Contingent consideration [3] (4,830,000)   (4,830,000)        
Interest rate swap (18,691,000)   (18,691,000)       (13,483,000)
Total recorded at fair value 174,121,000   174,121,000       236,214,000
Fair Value Measurements Recurring [Member] | Level 1 | Fair Value [Member]              
Assets:              
Equity method investment - FOX 197,742,000   197,742,000        
Interest rate cap             249,747,000
Liabilities:              
Call option of noncontrolling shareholder [2] 0   0        
Put option of noncontrolling shareholders 0 [1]   0 [1]       0
Contingent consideration [3] 0   0        
Interest rate swap 0   0       0
Total recorded at fair value 197,742,000   197,742,000       249,747,000
Fair Value Measurements Recurring [Member] | Level 2 | Fair Value [Member]              
Assets:              
Equity method investment - FOX 0   0        
Interest rate cap             0
Liabilities:              
Call option of noncontrolling shareholder [2] 0   0        
Put option of noncontrolling shareholders 0 [1]   0 [1]       0
Contingent consideration [3] 0   0        
Interest rate swap (18,691,000)   (18,691,000)       (13,483,000)
Total recorded at fair value (18,691,000)   (18,691,000)       (13,483,000)
Fair Value Measurements Recurring [Member] | Level 3 | Fair Value [Member]              
Assets:              
Equity method investment - FOX 0   0        
Interest rate cap             0
Liabilities:              
Call option of noncontrolling shareholder [2] (50,000)   (50,000)        
Put option of noncontrolling shareholders (50,000) [1]   (50,000) [1]       (50,000)
Contingent consideration [3] (4,830,000)   (4,830,000)        
Interest rate swap 0   0       0
Total recorded at fair value $ (4,930,000)   $ (4,930,000)       $ (50,000)
FOX              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Non-controlling interest 23.00%   23.00%   33.10%   41.20%
[1] Represents put options issued to noncontrolling shareholders in connection with the Liberty acquisition.
[2] Represents a put option issued to a noncontrolling shareholder in connection with the 5.11 Tactical acquisition.
[3] Represents potential earn-outs payable by Sterno Products for the acquisition of NII and Ergobaby