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Investments in Equity Securities (Tables) (Equity Securities [Member])
6 Months Ended
Jun. 30, 2013
Equity Securities [Member]
 
Schedule of Available-for-sale Securities [Line Items]  
Schedule of Investments in Equity Securities
At June 30, 2013 and December 31, 2012, investments in equity securities were as follows:
 
(In thousands)
Cost
 
Gross Unrealized
 
Fair
Value
 
Carrying
Value
Gains
 
Losses
 
June 30, 2013
 
 
 
 
 
 
 
 
 
Common stocks
$
275,719

 
$
60,277

 
$
(5,360
)
 
$
330,636

 
$
330,636

Preferred stocks
82,905

 
25,684

 
(4,384
)
 
104,205

 
104,205

Total
$
358,624

 
$
85,961

 
$
(9,744
)
 
$
434,841

 
$
434,841

December 31, 2012
 
 
 
 
 
 
 
 
 
Common stocks
$
222,671

 
$
60,102

 
$
(707
)
 
$
282,066

 
$
282,066

Preferred stocks
85,504

 
10,103

 
(1,651
)
 
93,956

 
93,956

Total
$
308,175

 
$
70,205

 
$
(2,358
)
 
$
376,022

 
$
376,022