NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2013 item segment	Dec. 31, 2012 segment	Dec. 31, 2011
Goodwill
Number of reporting segments		2	3
Number of events indicating impairment of goodwill		0
Impairment of goodwill	$ 0
Goodwill		404,302,000	404,211,000	402,736,000
Revenue Recognition
Amount charged from trustee clients for support services		0
Number of components of monthly deposit fees		2
Depreciation and Software and Leasehold Amortization
Depreciation and software and leasehold amortization		30,971,000	27,399,000	23,081,000
Costs related to services		16,000,000	12,800,000	10,200,000
Foreign Currency Translation
Cumulative translation adjustments included in accumulated other comprehensive loss		$ 500,000	$ 1,400,000	$ 2,000,000
Minimum
Intangible Assets
Useful lives of intangible assets		5 years
Maximum
Intangible Assets
Useful lives of intangible assets		10 years