Acquisitions - Additional Disclosures (Details) - USD ($) $ in Thousands					3 Months Ended	12 Months Ended
	Jan. 27, 2015	Apr. 01, 2014	Jan. 01, 2014	May. 10, 2013	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Payments for acquisition, net of cash acquired						$ 1,250	$ 5,704	$ 53,396
Increase in long-term debt						0	0	26,190
Final adjustment related to acquisition, increase in current deferred tax assets						$ 0	$ 1,162	0
IAL [Member]
Business Acquisition [Line Items]
Percent of membership interests acquired	100.00%
Consideration transferred, cash payments	$ 1,300
Common stock, shares issued	60,024
SiteLark [Member]
Business Acquisition [Line Items]
Percent of membership interests acquired		100.00%
Consideration transferred, cash payments		$ 400
Common stock, shares issued		5,327
EOGA [Member]
Business Acquisition [Line Items]
Percent of membership interests acquired			100.00%
Payments for acquisition, net of cash acquired			$ 5,300
Common stock, shares issued			94,354
Florida Chemical Company, Inc [Member]
Business Acquisition [Line Items]
Percent of membership interests acquired				100.00%
Consideration transferred, cash payments				$ 49,500
Increase in long-term debt				25,000
Additional borrowing on credit facility				$ 28,700
Common stock, shares issued				3,284,180
Revenue of the acquired business from the date of acquisition								50,900
Income from operations of the acquired business from the date of acquisition								$ 10,000
Final adjustment related to acquisition, increase in current deferred tax assets					$ 1,200
Florida Chemical Company, Inc [Member] | Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Acquisition costs incurred				$ 1,400