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

12 Months Ended

Mar. 31, 2013

Investments, Debt and Equity Securities [Abstract]

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

The adjusted cost and estimated market value of available-for-sale investments at March 31, 2013 and 2012, respectively, by contractual maturity, were as follows:

		March 31, 2013				March 31, 2012
		Amortized Cost		Estimated Market Value		Amortized Cost		Estimated Market Value
		(In thousands)
Due in one year or less	$	43,658	$	44,333	$	40,219	$	40,688
Due after one year through five years		180,448		191,930		157,444		165,852
Due after five years through ten years		281,546		302,188		176,694		188,225
Due after ten years		448,169		486,780		291,990		319,160
		953,821		1,025,231		666,347		713,925
Mortgage backed securities		6,730		6,985		11,572		11,811
Redeemable preferred stocks		23,705		24,212		24,370		23,177
Equity securities		43,729		38,910		27,736		17,879
	$	1,027,985	$	1,095,338	$	730,025	$	766,792