EMPLOYEE BENEFIT PLANS (Tables)

9 Months Ended

Dec. 31, 2011

Employee Benefit Plans [Abstract]

Schedule of components of net periodic pension cost

	Three Months Ended				Nine Months Ended
	December 31,				December 31,
	2011		2010		2011		2010
Service cost for benefits earned during the period	$	1,577	$	1,354	$	4,825	$	3,966
Interest cost on pension benefit obligation		6,960		6,760		21,294		19,800
Expected return on assets		(7,228)		(6,783)		(22,114)		(19,870)
Amortization of unrecognized losses		1,329		1,325		4,066		3,882
Net periodic pension cost	$	2,638	$	2,656	$	8,071	$	7,778

Schedule of Black Scholes Assumptions [Table Text Block]

Risk free interest rate		1.52	%
Expected life (years)		6
Volatility		47.05	%
Dividend yield		1.37	%
Weighted average exercise price of options granted	$	43.79	per option
Weighted average grant-date fair value of options granted	$	17.32	per option