Condensed Consolidated Statement of Comprehensive Income - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Revenue	$ 269,220,000	$ 252,227,000	$ 540,292,000	$ 494,323,000
Cost of goods sold	204,126,000	193,248,000	413,253,000	380,278,000
Gross profit	65,094,000	58,979,000	127,039,000	114,045,000
Operating expenses:
Selling, general and administrative expenses	51,418,000	47,134,000	102,910,000	96,049,000
Depreciation and amortization	4,721,000	4,266,000	9,316,000	8,357,000
Change in fair value of contingent consideration	7,276,000	676,424	9,187,336	989,657
Restructuring Charges	623,000	0	3,967,000	0
Income from operations	1,056,000	6,903,000	1,659,000	8,649,000
Other income (expense):
Interest income	24,000	27,000	38,000	48,000
Interest expense	(985,000)	1,105,000	(2,062,000)	2,251,000
Other, net	291,000	13,000	130,000	97,000
Total other expense	(670,000)	(1,065,000)	(1,894,000)	(2,106,000)
Income (loss) before income taxes	386,000	5,838,000	(235,000)	6,543,000
Income tax expense	2,710,000	2,183,000	4,782,000	2,613,000
Net income (loss)	$ (2,324,000)	$ 3,655,000	$ (5,017,000)	$ 3,930,000
Basic earnings per share (in dollars per share)	$ (0.04)	$ 0.07	$ (0.09)	$ 0.07
Diluted earnings per share (in dollars per share)	$ (0.04)	$ 0.07	$ (0.09)	$ 0.07
Comprehensive income (loss)	$ (3,714,000)	$ 5,753,000	$ (6,877,000)	$ (414,000)