GOODWILL AND IDENTIFIABLE INTANGIBLE ASSETS (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended											12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Goodwill [Roll Forward]
Balance at beginning of year					$ 130,074	[1]					$ 129,617	$ 130,074	[1]	$ 129,617		$ 129,348
Central acquisition												22,544
Impairment			(2,227)									(2,227)	[2]		[2]		[2]
Earn out payments from prior acquisitions														457		269
Balance at end of year	$ 150,391	[1]					$ 130,074	[1]				$ 150,391	[1]	$ 130,074	[1]	$ 129,617

[1] Approximately $38.3 million and $39.5 million is expected to be deductible for tax purposes at December 31, 2012 and 2011, respectively.

[2] Amount represents the total amount of goodwill relating to Compass Exchange Advisors, LLC, which was acquired in January 2007.