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Available-for-Sale Investments (Table Text Block)
 12 Months Ended
Mar. 31, 2014
Investments, Debt and Equity Securities [Abstract]  
Available-for-Sale Investments
 
 Available-for-sale investments at March 31, 2014 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
$
49,883
$
1,475
$
-
$
(1,004
 )$
50,354
U.S. government agency mortgage-backed securities
 
36,258
 
2,558
 
(4
 ) 
(425
 ) 
38,387
Obligations of states and political subdivisions
 
166,311
 
4,834
 
(308
 ) 
(3,627
 ) 
167,210
Corporate securities
 
834,923
 
26,075
 
(3,794
 ) 
(25,875
 ) 
831,329
Mortgage-backed securities
 
12,425
 
279
 
(3
 ) 
(514
 ) 
12,187
Redeemable preferred stocks
 
18,445
 
283
 
(82
 ) 
(1,113
 ) 
17,533
Common stocks
 
17,299
 
3,987
 
(1
 ) 
(10
 ) 
21,275
 
$
1,135,544
$
39,491
$
(4,192
 )$
(32,568
 )$
1,138,275
 
 
 
 
 
 
 
 
 
 
 
 
 
Available-for-sale investments at March 31, 2013 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
$
24,518
$
2,749
$
(3
 )$
(3
 )$
27,261
U.S. government agency mortgage-backed securities
 
44,934
 
4,027
 
(7
 ) 
(73
 ) 
48,881
Obligations of states and political subdivisions
 
154,692
 
16,056
 
(2
 ) 
(292
 ) 
170,454
Corporate securities
 
729,677
 
51,596
 
(373
 ) 
(2,265
 ) 
778,635
Mortgage-backed securities
 
6,730
 
282
 
(27
 ) 
-
 
6,985
Redeemable preferred stocks
 
23,705
 
751
 
(214
 ) 
(30
 ) 
24,212
Common stocks
 
43,729
 
273
 
(4,685
 ) 
(407
 ) 
38,910
 
$
1,027,985
$
75,734
$
(5,311
 )$
(3,070
 )$
1,095,338