Business Acquisitions Sales and Earnings (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Revenue									$ 73,664	$ 79,017	$ 109,338
Net income (loss)									$ (8,623)	$ (25,803)	$ 7,865
Basic (in dollars per share)	$ (0.39)	$ (0.01)	$ (0.06)	$ (0.07)	$ (0.75)	$ 0.05	$ (0.03)	$ (0.05)	$ (0.54)	$ (0.78)	$ 0.23
Diluted (in dollars per share)	$ (0.39)	$ (0.01)	$ (0.06)	$ (0.07)	$ (0.75)	$ 0.05	$ (0.03)	$ (0.05)	$ (0.54)	$ (0.78)	$ 0.23
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