Fair Value - Quantitative Disclusure (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Fair Value Inputs Liabilities Quantitative Information [Line Items]
Fair Value Inputs Weighted Average Probabilities	As of December 31, 2012, the probabilities applied to the payout scenarios ranged from 20% to 50%, depending on the Company’s estimate of the likelihood of each payout scenario.
Summit Earnout [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
FairValueInputsDiscountRate	14.50%
Fair Value Measurements Valuation Techniques	Discounted cash flow
Acquisition-related Consideration	4,497
Noncompetition Agreement Obligation [Member]
Fair Value Inputs Liabilities Quantitative Information [Line Items]
FairValueInputsDiscountRate	14.00%
Fair Value Measurements Valuation Techniques	Discounted cash flow
Acquisition-related Consideration	404