Consolidated Statement of Income (Loss) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
REVENUES	$ 825,341	$ 839,743	$ 747,718
COST OF REVENUES	714,519	732,055	667,989
Gross Profit	110,822	107,688	79,729
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	71,469	72,480	71,711
AMORTIZATION EXPENSE	1,327	1,515	1,580
Operating Income	38,026	33,693	6,438
OTHER (INCOME) EXPENSE	(152)	215	139
INTEREST EXPENSE	21,359	20,716	21,087
Income (Loss) Before Provision (Benefit) for Income Taxes	16,819	12,762	(14,788)
PROVISION (BENEFIT) FOR INCOME TAXES	9,758	5,131	(2,337)
NET INCOME (LOSS)	7,061	7,631	(12,451)
Less: Non-controlling interest in subsidiary’s income (loss)	1	1	(6)
NET INCOME (LOSS) ATTRIBUTABLE TO CVG STOCKHOLDERS	$ 7,060	$ 7,630	$ (12,445)
EARNINGS (LOSS) PER COMMON SHARE:
Basic earnings per share attributable to common stockholders (in dollars per share)	$ 0.24	$ 0.26	$ (0.44)
Diluted earnings per share attributable to common stockholders (in dollars per share)	$ 0.24	$ 0.26	$ (0.44)
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic weighted average shares outstanding (in shares)	29,209	28,926	28,584
Dilutive weighted average shares outstanding (in shares)	29,399	29,117	28,584