PROPERTY PLANT AND EQUIPMENT (PPE BREAKOUT BY TYPE TABLE) (DETAILS) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property Plant and Equipment Line Items
Property, plant and equipment, gross	$ 575,499	$ 555,054	$ 535,191
Less: Accumulated depreciation and amortization	(448,780)	(442,778)
Property, plant and equipment, net	126,719	112,276
Land and buildings [Member]
Property Plant and Equipment Line Items
Property, plant and equipment, gross	38,833	38,833
Computer equipment and software [Member]
Property Plant and Equipment Line Items
Property, plant and equipment, gross	297,567	279,129
Telephone equipment [Member]
Property Plant and Equipment Line Items
Property, plant and equipment, gross	39,238	42,914
Furniture and fixtures [Member]
Property Plant and Equipment Line Items
Property, plant and equipment, gross	50,638	50,322
Leasehold improvements [Member]
Property Plant and Equipment Line Items
Property, plant and equipment, gross	148,890	143,051
Motor vehicles [Member]
Property Plant and Equipment Line Items
Property, plant and equipment, gross	188	355
Construction-in-progress and other [Member]
Property Plant and Equipment Line Items
Property, plant and equipment, gross	$ 145	$ 450