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Available-for-Sale Investments (Table Text Block)
 3 Months Ended
Jun. 30, 2014
Other than temporary impairment credit losses recognized in earnings [Abstract]  
Available-for-Sale Investments
 
 
 
 
Amortized
Cost
 
Gross
Unrealized
Gains
 
Gross
Unrealized
Losses More than 12 Months
 
Gross
Unrealized
Losses Less than 12 Months
 
Estimated
Market
Value
 
 
(Unaudited)
 
 
(In thousands)
U.S. treasury securities and government obligations
$
48,959
$
2,405
$
(261
 )$
(83
 )$
51,020
U.S. government agency mortgage-backed securities
 
34,679
 
2,754
 
(332
 ) 
(18
 ) 
37,083
Obligations of states and political subdivisions
 
167,039
 
7,955
 
(358
 ) 
(1,607
 ) 
173,029
Corporate securities
 
877,948
 
34,019
 
(5,028
 ) 
(9,838
 ) 
897,101
Mortgage-backed securities
 
15,335
 
296
 
(2
 ) 
(272
 ) 
15,357
Redeemable preferred stocks
 
17,447
 
426
 
-
 
(669
 ) 
17,204
Common stocks
 
18,570
 
3,970
 
(2
 ) 
(20
 ) 
22,518
 
$
1,179,977
$
51,825
$
(5,983
 )$
(12,507
 )$
1,213,312
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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