LONG-TERM OBLIGATIONS (Details) (USD $)	1 Months Ended			3 Months Ended	6 Months Ended		6 Months Ended					3 Months Ended	6 Months Ended							6 Months Ended			3 Months Ended
	May 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Senior revolving loan	Jun. 30, 2012 Senior revolving loan option quarter	Dec. 31, 2011 Senior revolving loan	Jun. 30, 2012 Senior revolving loan Minimum	Jun. 30, 2012 Senior revolving loan Maximum	Jun. 30, 2012 Senior revolving loan Prime rate	Jun. 30, 2012 Senior revolving loan Prime rate Minimum	Jun. 30, 2012 Senior revolving loan Prime rate Maximum	Jun. 30, 2012 Senior revolving loan LIBOR	Jun. 30, 2012 Senior revolving loan LIBOR	Jun. 30, 2012 Senior revolving loan LIBOR Minimum	Jun. 30, 2012 Senior revolving loan LIBOR Maximum	Jun. 30, 2012 Capital leases	Dec. 31, 2011 Capital leases	Jun. 30, 2012 Acquisition-related liabilities	Dec. 31, 2011 Acquisition-related liabilities	Jun. 30, 2012 Contingent consideration De Novo Legal LLC	Dec. 31, 2011 Contingent consideration De Novo Legal LLC	Dec. 28, 2011 Contingent consideration De Novo Legal LLC year	Jun. 30, 2011 Contingent consideration Jupiter eSources	Oct. 01, 2010 Contingent consideration Jupiter eSources year	Jun. 30, 2012 Deferred acquisition price De Novo Legal LLC	Dec. 31, 2011 Deferred acquisition price De Novo Legal LLC	Dec. 31, 2011 Deferred acquisition price Jupiter eSources	Jun. 30, 2012 Notes payable	Dec. 31, 2011 Notes payable
LONG-TERM OBLIGATIONS
Total long-term obligations, including current portion		$ 242,099,000	$ 263,478,000	$ 212,000,000	$ 212,000,000	$ 217,000,000										$ 5,017,000	$ 6,025,000	$ 16,029,000	$ 29,449,000	$ 11,522,000					$ 4,507,000	$ 4,870,000		$ 9,053,000	$ 11,004,000
Total current maturities of long-term obligations		(17,343,000)	(15,484,000)													(2,992,000)	(3,213,000)	(10,382,000)	(8,347,000)	(5,875,000)	(16,226,000)				(4,507,000)		(8,353,000)	(3,969,000)	(3,924,000)
Total Long-term obligations		224,756,000	247,994,000																	5,647,000	16,226,000					4,870,000
Weighted average interest rate (as a percent)				3.10%	3.10%											7.00%		8.10%										2.20%
Aggregate amount of funds available				325,000,000	325,000,000
Decrease in the fair value recognized																				5,500,000			2,800,000
Maximum borrowing capacity subject at the entity's option, subject to compliance with covenants				375,000,000	375,000,000
Number of rate options					2
Variable interest rate basis									Prime				LIBOR
Basis points added to reference rate (as a percent)										0.75%	1.75%			1.75%	2.75%
Average amount of borrowing under the credit facility				219,300,000
Remaining amount of borrowing under the credit facility				36,000,000	36,000,000
Weighted average interest rate for the average amount of borrowings (as a percent)				3.00%								3.10%
Maximum month-end amount outstanding				227,000,000
Leverage ratio, numerator								3.00
Leverage ratio, denominator								1.00
Fixed charge coverage ratio, numerator							1.25
Fixed charge coverage ratio, denominator							1.00
Specified limit of borrowings under capital leases								15,000,000
Specified limit of borrowings under subordinated debt								100,000,000
Number of quarters prior to acquisition for which compliance with covenants is required					4
Cash consideration in an acquisition that if in excess, bank permission is required for compliance with debt covenants							125,000,000
Total consideration in an acquisition that if in excess, bank permission is required for compliance with debt covenants							175,000,000
Maximum amount of total consideration of all acquisitions consummated during the term of the credit facility allowed per the terms of the debt covenants before bank permission is required								300,000,000
Potential undiscounted amount of all future payments, minimum																						0		0
Potential undiscounted amount of all future payments, maximum																						29,100,000		20,000,000
Period over which potential undiscounted amount of all future payments are required (in years)																						2		4
Contingent consideration paid	$ 8,400,000