Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenues	$ 897,737	$ 755,231	$ 662,112
Cost of revenues	768,885	663,513	575,409
Gross Profit	128,852	91,718	86,703
Selling, general and administrative expenses	60,679	59,547	60,482
Amortization expense	1,300	1,320	1,305
Operating Income	66,873	30,851	24,916
Other income	1,311	1,943	1,236
Interest expense	14,676	19,149	19,318
Income Before Provision for Income Taxes	53,508	13,645	6,834
Provision for income taxes	8,996	15,350	49
Net income (loss)	44,512	(1,705)	6,785
Net (loss) income attributable to CVG	$ 44,512	$ (1,705)	$ 6,785
Earnings (loss) per common share
Basic (in dollars per share)	$ 1.47	$ (0.06)	$ 0.23
Diluted (in dollars per share)	$ 1.46	$ (0.06)	$ 0.23
Weighted average shares outstanding
Basic (in shares)	30,277	29,942	29,530
Diluted (in shares)	30,587	29,942	29,878