STOCK-BASED COMPENSATION (Details) (USD $)	0 Months Ended				1 Months Ended				12 Months Ended
	Jun. 06, 2012	Apr. 02, 2012	Feb. 27, 2012	Dec. 17, 2010	Jun. 30, 2012	Apr. 30, 2012	Feb. 29, 2012	Dec. 31, 2010	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Options outstanding, Shares (in shares)									1,303,192
Options outstanding, Weighted average remaining life									4 years 9 months 29 days
Options outstanding, Weighted Average Exercise Price (in dollars per share)									$ 10.3077
Options exercisable, Shares (in shares)									1,134,088
Options exercisable, Weighted Average Exercise Price (in dollars per share)									$ 10.2890
7.00 - 8.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range lower range limit (in dollars per share)									$ 7.00
Exercise price range upper range limit (in dollars per share)									$ 8.99
Options outstanding, Shares (in shares)									108,450
Options outstanding, Weighted average remaining life									2 years 22 days
Options outstanding, Weighted Average Exercise Price (in dollars per share)									$ 7.4110
Options exercisable, Shares (in shares)									108,450
Options exercisable, Weighted Average Exercise Price (in dollars per share)									$ 7.4110
9.00 - 9.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range lower range limit (in dollars per share)									$ 9.00
Exercise price range upper range limit (in dollars per share)									$ 9.99
Options outstanding, Shares (in shares)									541,107
Options outstanding, Weighted average remaining life									4 years 11 months 1 day
Options outstanding, Weighted Average Exercise Price (in dollars per share)									$ 9.5475
Options exercisable, Shares (in shares)									451,010
Options exercisable, Weighted Average Exercise Price (in dollars per share)									$ 9.4881
10.00 - 10.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range lower range limit (in dollars per share)									$ 10.00
Exercise price range upper range limit (in dollars per share)									$ 10.99
Options outstanding, Shares (in shares)									203,391
Options outstanding, Weighted average remaining life									4 years 10 months 24 days
Options outstanding, Weighted Average Exercise Price (in dollars per share)									$ 10.7823
Options exercisable, Shares (in shares)									155,337
Options exercisable, Weighted Average Exercise Price (in dollars per share)									$ 10.9000
11.00 - 11.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range lower range limit (in dollars per share)									$ 11.00
Exercise price range upper range limit (in dollars per share)									$ 11.99
Options outstanding, Shares (in shares)									335,800
Options outstanding, Weighted average remaining life									4 years 9 months 11 days
Options outstanding, Weighted Average Exercise Price (in dollars per share)									$ 11.5426
Options exercisable, Shares (in shares)									335,800
Options exercisable, Weighted Average Exercise Price (in dollars per share)									$ 11.5426
12.00 - 12.99 [Member]
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Exercise price range lower range limit (in dollars per share)									$ 12.00
Exercise price range upper range limit (in dollars per share)									$ 12.99
Options outstanding, Shares (in shares)									114,444
Options outstanding, Weighted average remaining life									7 years 1 month 13 days
Options outstanding, Weighted Average Exercise Price (in dollars per share)									$ 12.1800
Options exercisable, Shares (in shares)									83,491
Options exercisable, Weighted Average Exercise Price (in dollars per share)									$ 12.1800
Stock options [Member]
Stock options [Abstract]
Vesting rights of awards granted									One-third exercisable one year from the grant date and the remaining two-thirds vesting two and three years from grant date, respectively.
Additional disclosures [Abstract]
Stock option modification cost									$ 250,000
Unrecognized compensation expense									401,624
Unrecognized compensation cost, Period of recognition									1 year 7 months 6 days
Share-based Compensation Expense									753,924
Stock options [Member] | Senior executives [Member]
Stock options [Abstract]
Term of awards									10 years
Weighted average grant date fair value per unit (in dollars per unit)					$ 2.91	$ 3.18	$ 2.96	$ 3.95
Assumptions used [Abstract]
Expected term									5 years	0 years	5 years
Risk-free interest rate (in hundredths)										0.00%
Expected volatility (in hundredths)										0.00%
Dividend yield (in hundredths)										0.00%
Options [Roll Forward]
Outstanding at beginning of period (in shares)							1,223,292		1,223,292
Granted (in shares)	3,300	54,625	97,299	125,448					155,224
Forfeited (in shares)									(28,078)
Expired (in shares)									(9,956)
Exercises (in shares)									(37,290)
Outstanding at end of period (in shares)									1,303,192	1,223,292
Exercisable at end of period (in shares)									1,134,088
Weighted average exercise price [Roll Forward]
Outstanding at beginning of period (in dollars per share)							$ 10.2437		$ 10.2437
Granted (in dollars per share)									$ 10.0439
Forfeited (in dollars per share)									$ 10.8943
Expired (in dollars per share)									$ 5.5476
Exercised (in dollars per share)									$ 7.9407
Outstanding at end of period (in dollars per share)									$ 10.3077	$ 10.2437
Exercisable at end of period (in dollars per share)									$ 10.2890
Additional disclosures [Abstract]
Outstanding, average remaining life									4 years 9 months 29 days	5 years 6 months 7 days
Exercisable, average remaining life									4 years 2 months 23 days
Outstanding, aggregate intrinsic value									766,478	0.00
Exercisable, aggregate intrinsic value									718,907
Aggregate intrinsic value of options exercised									94,988	93,570	617,594
Stock options [Member] | Senior executives [Member] | Minimum [Member]
Assumptions used [Abstract]
Risk-free interest rate (in hundredths)									0.88%		1.90%
Expected volatility (in hundredths)									43.00%		29.00%
Dividend yield (in hundredths)									2.18%		1.88%
Stock options [Member] | Senior executives [Member] | Maximum [Member]
Assumptions used [Abstract]
Risk-free interest rate (in hundredths)									2.11%		3.53%
Expected volatility (in hundredths)									45.00%		45.00%
Dividend yield (in hundredths)									2.93%		2.48%
Restricted Stock Units [Member]
Restricted Stock Units [Abstract]
Number of non-employee Directors									5
Number of common share at vesting date for each grantee (in shares)									1
Weighted average fair value as of grant date (in dollars per share)	9.70
Unrecognized compensation expense									50,004
Restricted stock units transaction activity [Roll Forward]
Non-vested, beginning (in units)							8,385		8,385
Granted (in units)									15,465		8,385
Vested (in units)									(8,385)
Forfeited (in units)									0
Non-vested, ending (in units)									15,465
Additional disclosures [Abstract]
Share-based Compensation Expense									$ 150,009
1997 Plan [Member]
Equity Incentive Plans [Abstract]
Number of shares approved under Equity incentive plan (in shares)									350,000
2001 Plan [Member]
Equity Incentive Plans [Abstract]
Number of shares approved under Equity incentive plan (in shares)									350,000
Number of shares approved under Equity incentive plan after stock split (in shares)									829,629
2005 Plan [Member]
Equity Incentive Plans [Abstract]
Number of shares approved under Equity incentive plan (in shares)									500,000
Number of shares approved under Equity incentive plan after stock split (in shares)									888,888
2008 Plan [Member]
Equity Incentive Plans [Abstract]
Number of shares approved under Equity incentive plan (in shares)									750,000