EQUITY COMPENSATION PLANS AND SHARE-BASED COMPENSATION, Stock Options (Details) (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Additional disclosures [Abstract]
Total intrinsic value of stock options exercised	$ 81,000	$ 481,000
Proceeds from the exercise of stock options	17,000	77,000
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of grant	10 years
Unrecognized compensation expense	0
Options, number of shares [Roll Forward]
Outstanding, beginning of period (in shares)	72,000
Granted (in shares)	0
Exercised (in shares)	(2,000)
Canceled or forfeited (in shares)	0
Outstanding, end of period (in shares)	70,000
Vested and expected to vest, end of period (in shares)	70,000
Exercisable, end of period (in shares)	70,000
Options, average exercise price per share [Roll Forward]
Outstanding, beginning of period (in dollars per share)	$ 20.50
Granted (in dollars per share)	$ 0
Exercised (in dollars per share)	$ 8.20
Canceled or forfeited (in dollars per share)	$ 0
Outstanding, end of period (in dollars per share)	$ 20.87
Vested and expected to vest, end of period (in dollars per share)	$ 20.87
Exercisable, end of period (in dollars per share)	$ 20.87
Additional disclosures [Abstract]
Outstanding, weighted average remaining contractual life	10 months 6 days
Vested and expected to vest, weighted average remaining contractual life	10 months 6 days
Exercisable, weighted average remaining contractual life	10 months 6 days
Outstanding, aggregate intrinsic value	1,874,000
Vested and expected to vest, aggregate intrinsic value	1,874,000
Exercisable, aggregate intrinsic value	$ 1,874,000
Stock Options [Member] | Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	4 years
Stock Options [Member] | Non-Employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	1 year