LONG-TERM DEBT LONG-TERM DEBT - SUMMARY (Details) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2014	Jun. 18, 2014	Jan. 31, 2014	Jul. 31, 2014 1.50% Convertible Senior Notes	Jun. 18, 2014 1.50% Convertible Senior Notes	Jan. 31, 2014 1.50% Convertible Senior Notes	Jul. 31, 2014 February 2014 Term Loans	Jan. 31, 2014 February 2014 Term Loans	Jul. 31, 2014 March 2014 Term Loans	Mar. 07, 2014 March 2014 Term Loans	Jan. 31, 2014 March 2014 Term Loans	Jul. 31, 2014 March 2013 Term Loans	Jan. 31, 2014 March 2013 Term Loans	Jul. 31, 2014 2013 Revolving Line of Credit	Jan. 31, 2014 2013 Revolving Line of Credit	Jul. 31, 2014 Other debt	Jan. 31, 2014 Other debt
Debt Instrument
Principal Amount - 1.50% Convertible Senior Notes				$ 400,000	$ 400,000	$ 0
Gross term loan borrowings							130,729	0	280,413			0	645,125
Unamortized debt discount				(78,952)		0	(303)	0				0	(2,827)
1.50% Convertible Notes, Net		319,900		321,048
Term Loans							130,426	0	280,413	643,500	0	0	642,298
Borrowings Under Line of Credit Facility														0	0
Total debt	731,952		642,385													65	87
Current maturities of long-term debt	61		6,555
Long-term debt	$ 731,891		$ 635,830