LONG-TERM DEBT LONG-TERM DEBT - DEBT FEES (Details) (USD $)	3 Months Ended		9 Months Ended				6 Months Ended				12 Months Ended					9 Months Ended
	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014	Oct. 31, 2013	Oct. 31, 2014 February 2014 Term Loans	Jan. 31, 2014 February 2014 Term Loans	Jul. 31, 2014 March 2013 Term Loans	Mar. 07, 2014 March 2013 Term Loans	Mar. 06, 2013 March 2013 Term Loans	Mar. 06, 2013 2011 Credit Agreement	Jan. 31, 2014 2011 Credit Agreement April 2011 Term Loans	Mar. 06, 2013 2011 Credit Agreement April 2011 Term Loans	Mar. 06, 2013 2011 Credit Agreement 2011 Revolving Line of Credit	Mar. 06, 2013 2013 Amended Credit Agreement	Mar. 06, 2013 2013 Amended Credit Agreement March 2013 Term Loans	Oct. 31, 2014 2013 Amended Credit Agreement 2013 Revolving Line of Credit	Mar. 06, 2013 2013 Amended Credit Agreement 2013 Revolving Line of Credit	Mar. 07, 2014 2013 Amended Credit Agreement - 2014 Amendments March 2014 Term Loans	Feb. 03, 2014 2013 Amended Credit Agreement - 2014 Amendments February 2014 Term Loans	Jun. 18, 2014 2013 Amended Credit Agreement - 2014 Amendments 2013 Revolving Line of Credit
Debt Instrument
Unamortized deferred costs								$ 4,300,000		$ 11,000,000		$ 7,500,000	$ 3,500,000	$ 7,500,000	$ 5,000,000		$ 2,500,000	$ 2,400,000	$ 7,100,000	$ 700,000
Unamortized debt discount					289,000	0		2,800,000	3,300,000			2,200,000							800,000
Losses on early retirements of debt	$ 0	$ 0	$ (12,546,000)	$ (9,879,000)			$ 7,100,000				$ 9,700,000
Commitment fee on undrawn portion (as a percent)																0.50%