Business Acquisitions Sales and Earnings (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Revenue	$ 9,568	$ 12,596	$ 15,175	$ 17,822	$ 18,201	$ 21,677	$ 18,683	$ 15,103	$ 55,161	$ 73,664	$ 79,017
Net income (loss)									$ (15,724)	$ (8,623)	$ (25,803)
Basic (in dollars per share)	$ (0.39)	$ (0.13)	$ (0.11)	$ (0.11)	$ (0.39)	$ (0.01)	$ (0.06)	$ (0.07)	$ (0.74)	$ (0.54)	$ (0.78)
Diluted (in dollars per share)	$ (0.39)	$ (0.13)	$ (0.11)	$ (0.11)	$ (0.39)	$ (0.01)	$ (0.06)	$ (0.07)	$ (0.74)	$ (0.54)	$ (0.78)
PECO and FGC Acquisitions
Business Acquisition [Line Items]
Revenue										$ 4,193
Net income (loss)										$ (120)
Basic (in dollars per share)										$ 0.00
Diluted (in dollars per share)										$ 0.00