Acquisitions (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 2012 - Successor item	Dec. 31, 2012 2012 - Successor Minimum	Dec. 31, 2012 2012 - Successor Maximum	Dec. 31, 2011 2011 - Successor item	Dec. 31, 2011 2011 - Successor Minimum	Dec. 31, 2011 2011 - Successor Maximum
Business Acquisition
Number of acquisitions completed	10			11
Notes issued	$ 2,400,000			$ 2,100,000
Net forgiveness of management fees and promissory note				2,700,000
Preliminary aggregate purchase price allocation
Cash				307,000
Accounts receivable				1,730,000
Property and equipment	415,000			363,000
Other intangible assets	13,065,000			5,688,000
Goodwill	19,389,000			20,458,000
Prepaid expenses and other current assets	200,000			88,000
Liabilities	(5,000)			(376,000)
Aggregate purchase price	33,064,000			28,258,000
Period over which all intangible assets will be amortized		5 years	20 years		5 years	20 years
Expected deductible goodwill
The amount of goodwill expected to be deductible for tax purposes	$ 19,400,000			$ 20,500,000