Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Net income (loss)	$ 4,192	$ (54,856)	$ 181
Other comprehensive income (loss), net of tax:
Pension and postretirement plans, unrecognized gain (loss)	122	(56)	(280)
Total other comprehensive income (loss), net of tax	122	(56)	(280)
Comprehensive income (loss)	$ 4,314	$ (54,912)	$ (99)