Annual report pursuant to Section 13 and 15(d)

Capital Stock and Stock Restrictions (Details Textual)

Capital Stock and Stock Restrictions (Details Textual) (USD $)	12 Months Ended					12 Months Ended				12 Months Ended				1 Months Ended	12 Months Ended			1 Months Ended			12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2014 Preferred Stock [Member]	Mar. 31, 2013 Preferred Stock [Member]	Mar. 31, 2014 Class A Common Stock [Member]	Mar. 31, 2013 Class A Common Stock [Member]	Mar. 31, 2012 Class A Common Stock [Member]	Mar. 31, 2011 Class A Common Stock [Member]	Mar. 31, 2012 Class B Common Stock [Member]	Mar. 31, 2014 Class B Common Stock [Member]	Mar. 31, 2013 Class B Common Stock [Member]	Mar. 31, 2011 Class B Common Stock [Member]	Aug. 31, 2011 August Two Thousand Eleven Authorization [Member] Class A Common Stock [Member]	Mar. 31, 2014 August Two Thousand Eleven Authorization [Member] Class A Common Stock [Member]	Mar. 31, 2013 August Two Thousand Eleven Authorization [Member] Class A Common Stock [Member]	Mar. 31, 2012 August Two Thousand Eleven Authorization [Member] Class A Common Stock [Member]	May 31, 2011 February Two Thousand Ten Authorization [Member] Class A Common Stock [Member]	Feb. 28, 2010 February Two Thousand Ten Authorization [Member] Class A Common Stock [Member]	May 31, 2011 February Two Thousand Ten Authorization [Member] Class B Common Stock [Member]	Mar. 31, 2014 Outside of Publically Announced Repurchase Program [Member] Class A Common Stock [Member]	Mar. 31, 2013 Outside of Publically Announced Repurchase Program [Member] Class A Common Stock [Member]	Mar. 31, 2012 Outside of Publically Announced Repurchase Program [Member] Class A Common Stock [Member]	Mar. 31, 2014 Voting trust and other trusts [Member] Class B Common Stock [Member]	May 14, 2014 Subsequent Event [Member] Voting Trust [Member]	May 14, 2014 Subsequent Event [Member] Voting trust and other trusts [Member]
Class of Stock [Line Items]
Preferred Stock, Shares Authorized				1,000,000	1,000,000
Stock Repurchase Program, Authorized Amount														$ 20,000,000					$ 10,000,000
Treasury Stock, Shares, Acquired						162,000	5,788,000	6,552,000							0	5,700,000	6,400,000	1,000,000
Treasury Stock Acquired, Average Cost Per Share																$ 2.20	$ 2.63	$ 3.43			$ 2.22	$ 2.32	$ 3.52
Common Stock, Shares, Outstanding						45,852,740	44,969,841	50,429,000	54,174,000	13,937,000	13,937,151	13,937,151	14,556,000											13,937,150
Stock Repurchase Program Remaining Authorized Repurchases Amount															100,000
Shares Paid for Tax Withholding for Share Based Compensation																					161,699	133,816	113,734
Conversion of Stock, Shares Converted								619,000		619,000										618,664
Payments for Repurchase of Common Stock	$ 359,000	$ 12,733,000	$ 17,385,000															$ 3,400,000
Voting Control																									50.90%	54.90%