Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement [Abstract]
REVENUES	$ 662,112	$ 825,341	$ 839,743
COST OF REVENUES	574,882	714,519	732,055
Gross Profit	87,230	110,822	107,688
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	60,542	71,469	72,480
AMORTIZATION EXPENSE	1,305	1,327	1,515
Operating Income	25,383	38,026	33,693
OTHER (INCOME) EXPENSE	(769)	(152)	215
INTEREST EXPENSE	19,318	21,359	20,716
Income Before Provision for Income Taxes	6,834	16,819	12,762
PROVISION FOR INCOME TAXES	49	9,758	5,131
NET INCOME	6,785	7,061	7,631
Less: Non-controlling interest in subsidiary’s income	0	1	1
NET INCOME ATTRIBUTABLE TO CVG STOCKHOLDERS	$ 6,785	$ 7,060	$ 7,630
EARNINGS (LOSS) PER COMMON SHARE:
Basic (in dollars per share)	$ 0.23	$ 0.24	$ 0.26
Diluted (in dollars per share)	$ 0.23	$ 0.24	$ 0.26
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic (in shares)	29,530	29,209	28,926
Diluted (in shares)	29,878	29,399	29,117