Investments (Table Text Block)

12 Months Ended

Mar. 31, 2016

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Available-for-Sale Investments

Available-for-sale investments at March 31, 2016 were as follows:

		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses More than 12 Months		Gross Unrealized Losses Less than 12 Months		Estimated Market Value
		(In thousands)
U.S. treasury securities and government obligations	$	85,861	$	3,791	$	–	$	(193)	$	89,459
U.S. government agency mortgage-backed securities		21,845		1,596		(6)		(39)		23,396
Obligations of states and political subdivisions		166,725		10,660		(81)		(414)		176,890
Corporate securities		1,143,125		26,861		(8,013)		(28,181)		1,133,792
Mortgage-backed securities		42,991		475		–		(62)		43,404
Redeemable preferred stocks		17,977		556		–		(105)		18,428
Common stocks		17,732		7,822		(10)		(375)		25,169
	$	1,496,256	$	51,761	$	(8,110)	$	(29,369)	$	1,510,538

Available-for-sale investments at March 31, 2015 were as follows:

		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses More than 12 Months		Gross Unrealized Losses Less than 12 Months		Estimated Market Value
		(In thousands)
U.S. treasury securities and government obligations	$	99,722	$	5,658	$	(64)	$	–	$	105,316
U.S. government agency mortgage-backed securities		30,569		2,614		(39)		(3)		33,141
Obligations of states and political subdivisions		165,724		13,052		(298)		(10)		178,468
Corporate securities		885,470		44,426		(2,522)		(2,966)		924,408
Mortgage-backed securities		19,874		806		(1)		–		20,679
Redeemable preferred stocks		18,052		521		(253)		(24)		18,296
Common stocks		17,975		6,719		–		(40)		24,654
	$	1,237,386	$	73,796	$	(3,177)	$	(3,043)	$	1,304,962

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

		March 31, 2016				March 31, 2015
		Amortized Cost		Estimated Market Value		Amortized Cost		Estimated Market Value
		(In thousands)
Due in one year or less	$	48,679	$	49,146	$	36,355	$	37,055
Due after one year through five years		250,576		256,597		198,488		209,404
Due after five years through ten years		557,984		557,961		474,639		492,782
Due after ten years		560,317		559,833		472,003		502,092
		1,417,556		1,423,537		1,181,485		1,241,333
Mortgage backed securities		42,991		43,404		19,874		20,679
Redeemable preferred stocks		17,977		18,428		18,052		18,296
Equity securities		17,732		25,169		17,975		24,654
	$	1,496,256	$	1,510,538	$	1,237,386	$	1,304,962

Carrying Value of Other Investments

The carrying value of other investments was as follows:

		March 31,
		2016		2015
		(In thousands)
Mortgage loans, net	$	217,198	$	161,851
Short-term investments		34,798		47,739
Real estate		34,416		34,597
Policy loans		17,091		16,431
Other equity investments		6,569		8,102
	$	310,072	$	268,720