XML 33 R45.htm IDEA: XBRL DOCUMENT

Stock-Based Compensation (Black-Scholes Assumptions Used To Estimate Grant Date Fair Value Of SARs Issued During The Period) (Details) (Officer [Member], Stock Appreciation Rights (SARs) [Member])	9 Months Ended
	Dec. 31, 2011 years	Dec. 31, 2010 years
Officer [Member] \| Stock Appreciation Rights (SARs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected term, years	5.0	5.0
Expected volatility	35.80%	35.30%
Expected dividend yield	5.07%	4.73%
Risk-free interest rate	1.66%	2.36%

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

+ References+ Details