Assets and Liabilities Measured at Fair Value (Details) (Recurring Fair Value Measurement [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2013		Dec. 31, 2012
Liabilities at Fair Value [Abstract]
Contingent consideration	$ 7,950	[1]	$ 7,950	[1]
Interest Rate Derivatives	255	[2]
Liabilities fair value	8,205
Level 1 [Member]
Liabilities at Fair Value [Abstract]
Contingent consideration	0	[1]	0	[1]
Interest Rate Derivatives	0	[2]
Liabilities fair value	0
Level 2 [Member]
Liabilities at Fair Value [Abstract]
Contingent consideration	0	[1]	0	[1]
Interest Rate Derivatives	255	[2]
Liabilities fair value	255
Level 3 [Member]
Liabilities at Fair Value [Abstract]
Contingent consideration	7,950	[1]	7,950	[1]
Interest Rate Derivatives	0	[2]
Liabilities fair value	$ 7,950

[1] The Monte Carlo simulation was used with a normal probability distribution of the best estimate of EBITDA for 2013 to approximate fair value.

[2] The fair values of the derivatives are the amount the Company would receive or pay to terminate the contracts, considering quoted market prices of comparable agreements.