SHARE-BASED COMPENSATION (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Outstanding
Stock options (in shares)	1,411,500
Outstanding at the end of the period (in shares)	1,415,667
Weighted average exercise price of stock options (in dollars per share)	$ 46.25
Weighted average remaining years of stock options	5 years 4 months 24 days
Exercisable
Stock options (in shares)	944,500
Weighted average exercise price of stock options (in dollars per share)	$ 49.34
Additional disclosures
Share-based compensation expense (in dollars)	$ 2,325	$ 2,650	$ 3,307
Share-based compensation expense, net of tax (in dollars)	1,418	1,617	2,017
Share-based compensation expense, impact to basic earnings per share (in dollars per share)	$ 0.14	$ 0.15	$ 0.18
Share-based compensation expense, impact to diluted earnings per share (in dollars per share)	$ 0.14	$ 0.15	$ 0.17
Unrecognized compensation cost related to stock options (in dollars)	$ 5,009
Weighted average period over which compensation cost related to stock options is expected to be recognized	1 year 10 months 24 days
Restricted stock unit awards
Outstanding
Restricted stock unit awards (in shares)	4,167	16,667	38,959
$5.00 - $20.00
Outstanding and exercisable stock options and restricted stock unit awards
Exercise price, low end of range (in dollars per share)	$ 5.00
Exercise price, high end of range (in dollars per share)	$ 20.00
Outstanding
Stock options (in shares)	88,000
Weighted average exercise price of stock options (in dollars per share)	$ 16.64
Weighted average remaining years of stock options	5 years 10 months 24 days
Exercisable
Stock options (in shares)	47,000
Weighted average exercise price of stock options (in dollars per share)	$ 16.60
$20.01- $30.00
Outstanding and exercisable stock options and restricted stock unit awards
Exercise price, low end of range (in dollars per share)	$ 20.01
Exercise price, high end of range (in dollars per share)	$ 30.00
Outstanding
Stock options (in shares)	162,500
Weighted average exercise price of stock options (in dollars per share)	$ 26.88
Weighted average remaining years of stock options	6 years 8 months 12 days
Exercisable
Stock options (in shares)	50,000
Weighted average exercise price of stock options (in dollars per share)	$ 23.00
$30.01- $40.00
Outstanding and exercisable stock options and restricted stock unit awards
Exercise price, low end of range (in dollars per share)	$ 30.01
Exercise price, high end of range (in dollars per share)	$ 40.00
Outstanding
Stock options (in shares)	137,500
Weighted average exercise price of stock options (in dollars per share)	$ 38.59
Weighted average remaining years of stock options	9 years 9 months 18 days
Exercisable
Stock options (in shares)	2,500
Weighted average exercise price of stock options (in dollars per share)	$ 35.79
$40.01- $50.00
Outstanding and exercisable stock options and restricted stock unit awards
Exercise price, low end of range (in dollars per share)	$ 40.01
Exercise price, high end of range (in dollars per share)	$ 50.00
Outstanding
Stock options (in shares)	93,000
Weighted average exercise price of stock options (in dollars per share)	$ 41.50
Weighted average remaining years of stock options	3 years 3 months 18 days
Exercisable
Stock options (in shares)	84,000
Weighted average exercise price of stock options (in dollars per share)	$ 41.38
$50.01- $60.00
Outstanding and exercisable stock options and restricted stock unit awards
Exercise price, low end of range (in dollars per share)	$ 50.01
Exercise price, high end of range (in dollars per share)	$ 60.00
Outstanding
Stock options (in shares)	930,500
Weighted average exercise price of stock options (in dollars per share)	$ 54.04
Weighted average remaining years of stock options	4 years 7 months 6 days
Exercisable
Stock options (in shares)	761,000
Weighted average exercise price of stock options (in dollars per share)	$ 54.01