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Investments in Equity Securities Investments in Equity Securities (Tables)
3 Months Ended
Mar. 31, 2017
Equity securities available for sale  
Schedule of Available-for-sale Securities [Line Items]  
Schedule of Investments in Equity Securities
At March 31, 2017 and December 31, 2016, investments in equity securities were as follows:
 
(In thousands)
Cost
 
Gross Unrealized
 
Fair
Value
 
Carrying
Value
Gains
 
Losses
 
March 31, 2017
 
 
 
 
 
 
 
 
 
Common stocks
$
90,080

 
$
333,397

 
$
(2,148
)
 
$
421,329

 
$
421,329

Preferred stocks
121,360

 
70,795

 
(2,106
)
 
190,049

 
190,049

Total
$
211,440

 
$
404,192

 
$
(4,254
)
 
$
611,378

 
$
611,378

December 31, 2016
 
 
 
 
 
 
 
 
 
Common stocks
$
94,998

 
$
351,906

 
$
(1,046
)
 
$
445,858

 
$
445,858

Preferred stocks
125,589

 
101,392

 
(3,639
)
 
223,342

 
223,342

Total
$
220,587

 
$
453,298

 
$
(4,685
)
 
$
669,200

 
$
669,200