SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)	3 Months Ended	12 Months Ended			12 Months Ended				12 Months Ended
	Jun. 30, 2013	Dec. 31, 2013	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2012 Buildings and leasehold improvements Minimum	Dec. 31, 2012 Buildings and leasehold improvements Maximum	Dec. 31, 2013 Capitalized internal use software	Dec. 31, 2012 Capitalized internal use software	Dec. 31, 2012 Capitalized internal use software Minimum	Dec. 31, 2012 Capitalized internal use software Maximum	Dec. 31, 2012 Furniture and other equipment Minimum	Dec. 31, 2012 Furniture and other equipment Maximum
Property and equipment
Maturity period from date of purchase, short-term investments classified as cash equivalents, less than (in days)		91 days
Estimated useful lives, minimum (in years)					3 years	39 years			2 years	3 years	3 years	10 years
Capitalized software costs written-off	$ 2,700,000		$ 4,900,000
Net book value		$ 293,964,000		$ 270,512,000			$ 30,900,000	$ 33,400,000