Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2015	Mar. 31, 2015
Statement Of Financial Position [Abstract]
Common stock, par value	$ 100	$ 100
Common stock, shares authorized	15,000,000	15,000,000
Common stock, shares issued	13,660,000	13,660,000
Common stock, shares outstanding	13,660,000	13,660,000