SEGMENT REPORTING (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reconciliation of our segment performance measure to income (loss) before income taxes
Segment performance measure	$ 40,246	$ 33,162	$ 104,678	$ 101,851
Unallocated corporate expenses	(11,553)	(11,805)	(32,582)	(49,834)
Share-based compensation expense	(3,557)	(703)	(10,483)	(4,979)
Depreciation and software and leasehold amortization	(9,787)	(9,693)	(28,050)	(27,648)
Amortization of identifiable intangible assets	(5,831)	(3,184)	(13,326)	(9,470)
Impairment of goodwill and identifiable intangible assets			(1,162)
Fair value adjustment to contingent consideration	(19)		1,182	(1,142)
Other operating expense, net	(1,308)	(215)	(4,306)	(792)
Operating income	8,191	7,562	15,951	7,986
Interest expense, net	(5,357)	(3,941)	(15,061)	(12,657)
Income (loss) before income taxes	$ 2,834	$ 3,621	$ 890	$ (4,671)