v3.8.0.1
Consolidated Statements of Operations - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Income Statement [Abstract]    
Net revenue $ 208,743 $ 184,538
Cost of goods sold 137,502 105,243
Gross profit 71,241 79,295
Operating costs and expenses:    
Advertising and marketing 8,870 7,322
Selling expense 7,387 8,112
General and administrative 14,562 13,183
Amortization of customer relationships 5,994 5,872
Business combination transaction costs 47 0
Impairment of property and equipment 1,417 0
Related party expenses 92 83
Total operating costs and expenses 38,369 34,572
Operating income 32,872 44,723
Other expense (income):    
Interest expense, net 9,340 9,830
Gain on buyout of tax receivable agreement (12,372) 0
Other expense 83 714
Total other expense (income) (2,949) 10,544
Income before income taxes 35,821 34,179
Income tax expense 6,519 9,980
Net income 29,302 24,199
Less: Net income attributable to the non-controlling interest 5,461 8,367
Net income attributable to Class A stockholders $ 23,841 $ 15,832
Earnings per Class A share:    
Basic (usd per share) $ 0.24 $ 0.16
Diluted (usd per share) $ 0.23 $ 0.15
Weighted-average shares outstanding:    
Basic (shares) 99,895,075 98,250,917
Diluted (shares) 105,041,015 104,773,887