EMPLOYEE BENEFIT PLANS (Tables)

6 Months Ended

Sep. 30, 2013

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of components of net periodic pension cost

	Three Months Ended   September 30,						Six Months Ended   September 30,
	2013			2012			2013			2012
Service cost for benefits earned during the period	$	2,070		$	2,052		$	4,121		$	4,109
Interest cost on pension benefit obligation	6,602			6,418			13,140			12,851
Expected return on assets	(7,171		)	(7,264		)	(14,273		)	(14,545		)
Amortization of unrecognized losses	1,897			1,652			3,774			3,309
Net periodic pension cost	$	3,398		$	2,858		$	6,762		$	5,724

Schedule of Black Scholes Assumptions [Table Text Block]

Risk free interest rate	1.01%
Expected life (years)	5
Volatility	48.7%
Dividend yield	1.60%
Weighted average exercise price of options granted	$62.66 per option
Weighted average grant-date fair value of options granted	$23.77 per option