Goodwill, Other Intangible Assets and Long-Lived Assets (Details) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Summary of goodwill
Goodwill, Beginning Balance				$ 17,233,000
Reduction in goodwill	0	0	0	(2,711,000)	0	0
Goodwill, Ending Balance	$ 14,522,000	$ 17,233,000		$ 14,522,000	$ 17,233,000