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Revenue Recognition (Tables)
 6 Months Ended
Jun. 30, 2019
Revenue from Contract with Customer [Abstract]  
Summary of Revenues Disaggregated by End Market and Product The following tables present our revenues disaggregated by end market and product (in thousands):
                                                                 
 
Three months ended June 30,
   
Six months ended June 30,
 
 
2019
   
2018
   
2019
   
2018
 
Residential new construction
  $
282,494
     
76
 %   $
257,904
     
77
 %   $  
543,804
     
76
 %   $
487,546
     
77
 %
Repair and remodel
   
24,705
     
7
 %    
21,873
     
7
 %    
46,225
     
7
 %    
42,345
     
7
 %
Commercial
   
64,615
     
17
 %    
52,807
     
16
 %    
123,920
     
17
 %    
104,421
     
16
 %
                                                                 
Net revenues
  $
371,814
     
100
 %   $
332,584
     
100
 %   $
713,949
     
100
 %   $
634,312
     
100
 %
                                                                 
 
 
 
 
 
 
 
 
 
 
 
                                                                 
 
Three months ended June 30,
   
Six months ended June 30,
 
 
2019
   
2018
   
2019
   
2018
 
Insulation
  $
235,473
     
63
 %   $
218,493
     
66
 %   $  
456,695
     
64
 %   $
420,768
     
67
 %
Waterproofing
   
28,858
     
8
 %    
24,892
     
7
 %    
51,243
     
7
 %    
47,498
     
7
 %
Shower doors, shelving and mirrors
   
26,900
     
7
 %    
22,773
     
7
 %    
50,817
     
7
 %    
43,032
     
7
 %
Garage doors
   
21,782
     
6
 %    
19,326
     
6
 %    
43,454
     
6
 %    
34,792
     
5
 %
Rain gutters
   
12,996
     
4
 %    
10,608
     
3
 %    
24,195
     
3
 %    
19,266
     
3
 %
Window blinds
   
10,781
     
3
 %    
8,079
     
2
 %    
20,165
     
3
 %    
13,385
     
2
 %
Other building products
   
35,024
     
9
 %    
28,413
     
9
 %    
67,380
     
10
 %    
55,571
     
9
 %
                                                                 
Net revenues
  $
371,814
     
100
 %   $
332,584
     
100
 %   $
713,949
     
100
 %   $
634,312
     
100
 %
                                                                 
 
 
 
 
 
 
 
 
Summary of Assets and Liabilities Related to Uncompleted Contracts and Customer Deposits
Contract assets and liabilities related to our uncompleted contracts and customer deposits were as follows (in thousands):
                 
 
June 30,
   
December 31,
 
 
2019
   
2018
 
Contract assets
  $  
20,207
    $  
15,092
 
Contract liabilities
   
(7,380
 )    
(7,468
 )
 
 
 
 
 
Schedule of Cost and Estimated Earnings on Uncompleted Contracts
Uncompleted contracts were as follows (in thousands):
                 
 
June 30,
   
December 31,
 
 
2019
   
2018
 
Costs incurred on uncompleted contracts
  $  
99,087
    $  
114,826
 
Estimated earnings
   
53,596
     
58,952
 
                 
Total
   
152,683
     
173,778
 
Less: Billings to date
   
136,857
     
163,112
 
                 
Net under (over) billings
  $
15,826
    $
10,666
 
                 
 
 
 
 
 
Schedule of Net Under (Over) Billings
Net under (over) billings were as follows (in thousands):
                 
 
June 30,
   
December 31,
 
 
2019
   
2018
 
Costs and estimated earnings in excess of billings on uncompleted contracts (contract assets)
  $  
20,207
    $  
15,092
 
Billings in excess of costs and estimated earnings on uncompleted contracts (contract liabilities)
   
(4,381
 )    
(4,426
 )
                 
Net under (over) billings
  $
15,826
    $
10,666