GOODWILL AND INTANGIBLE ASSETS (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Amortizing and Non-amortizing intangible assets
Gross Carrying Amount	$ 150,050		$ 150,050		$ 150,050
Accumulated Amortization	99,801		99,801		90,099
Amortization of identifiable intangible assets	4,736	6,752	9,702	13,521
Customer relationships
Amortizing and Non-amortizing intangible assets
Gross Carrying Amount	124,512		124,512		124,512
Accumulated Amortization	82,151		82,151		73,713
Weighted average remaining life			7 years
Trade names
Amortizing and Non-amortizing intangible assets
Gross Carrying Amount	6,591		6,591		6,591
Accumulated Amortization	2,062		2,062		1,650
Weighted average remaining life			8 years
Non-compete agreements
Amortizing and Non-amortizing intangible assets
Gross Carrying Amount	18,947		18,947		18,947
Accumulated Amortization	$ 15,588		$ 15,588		$ 14,736
Weighted average remaining life			5 years