STOCKHOLDERS' EQUITY (Details) (USD $)	12 Months Ended			26 Months Ended	0 Months Ended
	Jan. 31, 2015 Class	Jan. 31, 2014	Jan. 31, 2013	Oct. 31, 2013	Jan. 22, 2015	Feb. 18, 2015	Sep. 30, 2011
Issuance of common stock [Abstract]
Net proceeds from stock issued	$ 37,046,000	$ 0	$ 0
Dividends [Abstract]
Number of classes of common stock	2
Dividends common stock percentage that Class A is entitled to as compared to class B (in hundredths)	120.00%
Declaration date	Jun. 11, 2014
Stock Repurchase Activity [Abstract]
Cash consideration for repurchase of common stock	0	686,000	7,530,000	12,500,000
Maximum [Member]
Stock Repurchase Activity [Abstract]
Number of shares authorized for repurchase (in shares)							1,000,000
Dividends Declaration Date One [Member]
Dividends [Abstract]
Record date	Dec. 23, 2014
Payable	Jan. 06, 2015
Amount paid	1,118,000
Dividends Declaration Date Two [Member]
Dividends [Abstract]
Record date	Sep. 23, 2014
Payable	Sep. 30, 2014
Amount paid	1,118,000
Dividends Declaration Date Three [Member]
Dividends [Abstract]
Record date	Jun. 25, 2014
Payable	Jul. 02, 2014
Amount paid	1,113,000
Dividends Declaration Date Four [Member]
Dividends [Abstract]
Record date	Apr. 30, 2014
Payable	May 07, 2014
Amount paid	1,103,000
Common Class A [Member]
Issuance of common stock [Abstract]
Stock issued (in shares)	2,000,000				2,000,000
Net proceeds from stock issued	37,000,000				37,000,000
Dividends [Abstract]
Stock voting right (in votes per share)	0.05
Stock Repurchase Activity [Abstract]
Shares repurchased (in shares)				897,000
Common Class A [Member] | Dividends Declaration Date One [Member]
Dividends [Abstract]
Dividend (in dollars per share)	$ 0.072
Common Class A [Member] | Dividends Declaration Date Two [Member]
Dividends [Abstract]
Dividend (in dollars per share)	$ 0.072
Common Class A [Member] | Dividends Declaration Date Three [Member]
Dividends [Abstract]
Dividend (in dollars per share)	$ 0.072
Common Class A [Member] | Dividends Declaration Date Four [Member]
Dividends [Abstract]
Dividend (in dollars per share)	$ 0.072
Common Class A [Member] | Subsequent Event [Member]
Issuance of common stock [Abstract]
Stock issued (in shares)						450,000
Net proceeds from stock issued						$ 8,400,000
Common Class B [Member]
Dividends [Abstract]
Stock voting right (in votes per share)	1
Stock Repurchase Activity [Abstract]
Shares repurchased (in shares)				103,000
Common Class B [Member] | Dividends Declaration Date One [Member]
Dividends [Abstract]
Dividend (in dollars per share)	$ 0.06
Common Class B [Member] | Dividends Declaration Date Two [Member]
Dividends [Abstract]
Dividend (in dollars per share)	$ 0.06
Common Class B [Member] | Dividends Declaration Date Three [Member]
Dividends [Abstract]
Dividend (in dollars per share)	$ 0.06
Common Class B [Member] | Dividends Declaration Date Four [Member]
Dividends [Abstract]
Dividend (in dollars per share)	$ 0.06