Long-Term Debt (Details Textual) (USD $) In Thousands, unless otherwise specified	1 Months Ended	6 Months Ended					6 Months Ended		6 Months Ended
	Mar. 31, 2011	Jun. 30, 2011	Jun. 30, 2012	Nov. 04, 2011	Apr. 18, 2011	May 28, 2010	Jun. 30, 2012 Term Loan [Member]	May 28, 2010 Term Loan [Member]	Jun. 30, 2012 Revolving Credit Facility [Member]	May 28, 2010 Revolving Credit Facility [Member]	Jun. 30, 2012 Senior Notes [Member]	Mar. 16, 2011 Senior Notes [Member]	May 28, 2010 Senior Notes [Member]
Long Term Debt (Additional Textual) [Abstract]
Credit Facility						$ 320,000		$ 290,000		$ 30,000
Duration of long term loan							6 years		5 years
Available senior facilities									5,936
Principal amount of senior note												50,000	150,000
Interest rate on senior note											10.875%	10.875%
Aggregate principal amount				350,000
Long Term Debt (Textual) [Abstract]
Euro Dollar Margin			3.75%
Base Rate Margin			2.75%
Euro Dollar minimum floor rate			1.75%
Minimum floor on base rate			2.75%
Premium on senior notes	4,625	4,625
Reduced secured leverage covenant					4.75
Basis point on term loan pricing					0.25%
Additional Basis point on term loan pricing					0.25%
Loan discount costs under amended senior facilities					1,250
Loan discount costs under incremental facility				750
Increase in aggregate term loan				$ 30,000