Debt (Details Textual) (USD $)	0 Months Ended	9 Months Ended
	Jul. 13, 2012	Sep. 30, 2012	Dec. 31, 2011
Debt (Textual) [Abstract]
New credit agreement entering date		Jul. 13, 2011
Expiry date of amended and restated credit agreement		Jul. 30, 2012
Secured revolving credit facility term, years	5 years
Secured revolving credit facility current borrowing capacity		$ 120,000,000
Interest rate on outstanding borrowings		Borrowings under the Credit Facility bear interest at a variable rate based upon, at the Company’s option, either London Interbank Offering Rate, (“LIBOR”) or the base rate (which is the highest of (i) the prime rate, (ii) 0.5% plus the overnight federal funds rate, and (iii) 1.0% in excess of the three-month LIBOR rate), plus in each case, an applicable margin. The applicable margin for LIBOR loans, based on the applicable leverage ratio, is either 2.25% or 2.50% per annum, and the applicable margin for base rate loans, based on the applicable leverage ratio, is either 1.25% or 1.50% per annum. At September 30, 2012 our rates, inclusive of applicable margins, were 2.5% and 4.5% for LIBOR and prime, respectively
Blended interest rate		2.50%
Percentage of fee payment on unused line of credit facility		0.375%
Credit facility financial covenants terms		(i) a maximum ratio of consolidated total debt to consolidated adjusted EBITDA of 3.00:1.00, and (ii) a minimum consolidated fixed charge coverage ratio of 1.25:1.00.
Maximum acquisition expense		2,000,000
Maximum cash non-operating expense		250,000
Maximum amount of various fees, cost and expenses to be taken in adjusted EBITDA		1,500,000
Period of calculating EBITDA (in month)		12 months
Current portion of long-term debt		10,000,000	10,000,000
Expected payment period of revolving credit facility ( in months)		12 months
Closing fees		800,000
Legal fees		$ 500,000
Credit facility basis spread on variable rate LIBOR		1.00%
Credit facility reference rate LIBOR		Three-month LIBOR
Ratio of consolidated total debt to consolidated adjusted EBITDA		3
Minimum consolidated fixed charge coverage ratio		1.25
Maximum [Member]
Debt (Textual) [Abstract]
Applicable margin leverage ratio for LIBOR loans		2.50%
Applicable margin leverage ratio for base rate loan for LIBOR loans		1.50%
Minimum [Member]
Debt (Textual) [Abstract]
Applicable margin leverage ratio for LIBOR loans		2.25%
Applicable margin leverage ratio for base rate loan for LIBOR loans		1.25%
Federal Funds Rate [Member]
Debt (Textual) [Abstract]
Interest rate on outstanding borrowings		0.5% plus the overnight federal funds rate
LIBOR Rate [Member]
Debt (Textual) [Abstract]
Interest rate on outstanding borrowings		1.0% in excess of the three-month LIBOR rate
Variable interest rate		2.50%
Credit facility basis spread on variable rate LIBOR		0.50%
Prime Rate [Member]
Debt (Textual) [Abstract]
Variable interest rate		4.50%