Adjusted Cost and Estimated Market Value Available-for-Sale Investment (Table Text Block)

9 Months Ended

Dec. 31, 2014

Investments, Debt and Equity Securities [Abstract]

Adjusted Cost and Estimated Market Value of Available-for-sale Investments

		December 31, 2014				March 31, 2014
		Amortized Cost		Estimated Market Value		Amortized Cost		Estimated Market Value
		(Unaudited)
		(In thousands)
Due in one year or less	$	46,796	$	47,453	$	20,235	$	20,475
Due after one year through five years		226,950		240,425		185,447		194,563
Due after five years through ten years		507,874		527,412		350,048		350,953
Due after ten years		401,502		418,788		531,645		521,289
		1,183,122		1,234,078		1,087,375		1,087,280
Mortgage backed securities		20,628		21,026		12,425		12,187
Redeemable preferred stocks		16,450		16,525		18,445		17,533
Common stocks		17,975		22,939		17,299		21,275
	$	1,238,175	$	1,294,568	$	1,135,544	$	1,138,275