Condensed Consolidated Statement of Comprehensive Income - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Revenue	$ 271,072,690	$ 242,095,497
Cost of goods sold	209,126,628	187,030,793
Gross profit	61,946,062	55,064,704
Operating expenses:
Selling, general and administrative expenses	50,626,915	47,647,330
Depreciation and amortization	4,595,735	4,090,938
Change in fair value of contingent consideration	1,910,922	313,233
Restructuring Charges	3,344,123	0
Income from operations	1,468,367	3,013,203
Other income (expense):
Interest income	13,359	20,888
Interest expense	(1,076,807)	(1,145,319)
Other, net	(160,703)	84,642
Total other expense	(1,224,151)	(1,039,789)
Income before income taxes	244,216	1,973,414
Income tax expense	2,393,089	834,694
Net income (loss)	$ (2,148,873)	$ 1,138,720
Basic earnings per share (in dollars per share)	$ (0.04)	$ 0.02
Diluted earnings per share (in dollars per share)	$ (0.04)	$ 0.02
Comprehensive loss	$ (2,619,281)	$ (5,303,290)