Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Statement of Financial Position [Abstract]
Common stock, par value (in usd per share)	$ 10	$ 10
Common stock, shares authorized	100,000	100,000
Common stock, shares issued	59,543	59,180
Common stock, shares outstanding	59,543	59,180