ACQUISITIONS (Details) (USD $)	3 Months Ended	6 Months Ended			1 Months Ended	3 Months Ended	6 Months Ended		1 Months Ended		1 Months Ended		1 Months Ended		1 Months Ended	3 Months Ended			3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended						1 Months Ended		1 Months Ended		1 Months Ended	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011	Apr. 30, 2011 Encore Discovery Solutions	Jun. 30, 2011 Encore Discovery Solutions	Jun. 30, 2011 Encore Discovery Solutions	Apr. 04, 2011 Encore Discovery Solutions	Apr. 30, 2011 Encore Discovery Solutions Trade names	Apr. 04, 2011 Encore Discovery Solutions Trade names	Apr. 30, 2011 Encore Discovery Solutions Non-compete agreements	Apr. 04, 2011 Encore Discovery Solutions Non-compete agreements	Apr. 30, 2011 Encore Discovery Solutions Customer relationships	Apr. 04, 2011 Encore Discovery Solutions Customer relationships	Dec. 31, 2011 De Novo Legal LLC	Mar. 31, 2012 De Novo Legal LLC	Jun. 30, 2012 De Novo Legal LLC	Dec. 28, 2011 De Novo Legal LLC	Jun. 30, 2012 De Novo Legal LLC Contingent consideration - purchase price consideration	Jun. 30, 2012 De Novo Legal LLC Contingent consideration - purchase price consideration	Dec. 28, 2011 De Novo Legal LLC Contingent consideration - purchase price consideration year	Jun. 30, 2012 De Novo Legal LLC Contingent consideration - continued employment	Jun. 30, 2012 De Novo Legal LLC Contingent consideration - continued employment	Jun. 30, 2012 De Novo Legal LLC Long-term Obligations Contingent consideration - purchase price consideration	Dec. 31, 2011 De Novo Legal LLC Long-term Obligations Contingent consideration - purchase price consideration	Jun. 30, 2012 De Novo Legal LLC Current maturities of long-term obligations Contingent consideration - purchase price consideration	Jun. 30, 2012 De Novo Legal LLC Other accrued liabilities Contingent consideration - continued employment	Jun. 30, 2012 De Novo Legal LLC Other long-term liabilities Contingent consideration - continued employment	Dec. 31, 2011 De Novo Legal LLC Trade names	Dec. 28, 2011 De Novo Legal LLC Trade names	Dec. 31, 2011 De Novo Legal LLC Non-compete agreements	Dec. 28, 2011 De Novo Legal LLC Non-compete agreements	Dec. 31, 2011 De Novo Legal LLC Customer relationships	Mar. 31, 2012 De Novo Legal LLC Customer relationships	Dec. 28, 2011 De Novo Legal LLC Customer relationships
Acquisition
Amount held as security for potential indemnification claims								$ 10,000,000														$ 1,300,000	$ 1,300,000				$ 900,000	$ 400,000
Amount withheld as security at the acquisition date for potential indemnification claims																		5,000,000
Total purchase price transferred to effect the acquisition
Cash paid at closing								103,385,000										67,866,000
Other consideration	942,000		942,000					844,000
Fair value of deferred cash consideration at closing																		4,417,000
Fair value of contingent consideration at closing																		16,226,000
Working capital adjustment								98,000										(1,861,000)
Total purchase price								104,327,000										86,648,000
Transaction related costs						500,000	3,700,000
Tangible assets and liabilities
Current assets, including cash acquired								20,044,000										11,214,000
Non-current assets								2,669,000										2,738,000
Current liabilities								(6,646,000)										(2,361,000)
Non-current liabilities								(15,115,000)										(500,000)
Intangible assets								32,578,000										34,629,000
Software								2,498,000
Goodwill recognized								68,299,000										40,928,000
Net assets acquired								104,327,000										86,648,000
Preliminary net deferred tax liability								16,000,000
Major classes of acquired intangible assets and software, as well as the respective weighted-average amortization periods
Identifiable intangible assets, Amount										1,617,000		1,362,000		29,599,000																850,000		2,900,000			30,879,000
Identifiable intangible assets, Weighted Average Amortization Period (in years)									5 years		2 years		7 years																5 years		5 years		8 years
Software internally developed, Amount		20,457,000		21,195,000				2,498,000
Software internally developed, Weighted Average Amortization Period (in years)					5 years
Pro forma financial information
Total revenue	88,352,000		173,189,000
Operating revenue	83,089,000		162,517,000
Net income	7,050,000		15,103,000
Period of deferral of purchase price held by company following closing date															18 months
Discount rate used in determining fair value of deferred cash consideration (as a percent)																		11.00%
Holdback amount recorded in long-term obligations															4,900,000		4,500,000
Potential undiscounted amount of all future payments, minimum																					0
Potential undiscounted amount of all future payments, maximum																					29,100,000
Period over which potential undiscounted amount of all future payments are required (in years)																					2
Portion of earn-out opportunity contingent upon certain of sellers remaining employees of company																					0.25
Portion of contingent consideration not contingent upon employment recorded in financial statements																								5,600,000	16,200,000	5,900,000
Compensation expense related to portion of the contingent consideration tied to employment reflected in general and administrative expense																						(400,000)	1,300,000
Adjustment to contingent consideration liability																			5,500,000	5,500,000		1,700,000
Change in fair value accretion expense included in interest expense																			400,000	800,000
Changes in preliminary purchase price allocation to reflect changes in fair value of property, plant and equipment acquired																1,500,000
Changes in preliminary purchase price allocation to reflect changes in fair value of intangibles acquired																																		200,000
Changes in preliminary purchase price allocation to reflect changes in fair value of goodwill acquired		$ 1,276,000														$ 1,300,000