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Schedule I - Summay of Investments - Other Than Investments in Related Parties
12 Months Ended
Dec. 31, 2015
Summary of Investments, Other than Investments in Related Parties [Abstract]  
Schedule I - Summary of Investments- Other than Investments in Related Parties
Types of investment
 
 
 
 
 
 
($ in thousands)
 
Amortized Cost or Cost
 
Fair Value
 
Carrying Amount
Fixed income securities:
 
 

 
 

 
 

Held-to-maturity:
 
 

 
 

 
 

Obligations of states and political subdivisions
 
$
175,269

 
181,880

 
176,117

Public utilities
 
9,637

 
10,662

 
9,647

All other corporate securities
 
10,591

 
11,353

 
10,396

Asset-backed securities
 
1,030

 
1,028

 
910

Commercial mortgage-backed securities
 
4,527

 
4,621

 
4,284

Total fixed income securities, held-to-maturity
 
201,054

 
209,544

 
201,354

 
 
 
 
 
 
 
Available-for-sale:
 
 

 
 

 
 

U.S. government and government agencies
 
99,485

 
104,115

 
104,115

Foreign government
 
14,885

 
15,181

 
15,181

Obligations of states and political subdivisions
 
1,314,779

 
1,359,142

 
1,359,142

Public utilities
 
156,786

 
157,270

 
157,270

All other corporate securities
 
1,735,510

 
1,742,912

 
1,742,912

Asset-backed securities
 
244,541

 
244,154

 
244,154

Commercial mortgage-backed securities
 
245,252

 
243,592

 
243,592

Residential mortgage-backed securities
 
541,276

 
541,837

 
541,837

Total fixed income securities, available-for-sale
 
4,352,514

 
4,408,203

 
4,408,203

 
 
 
 
 
 
 
Equity securities:
 
 

 
 

 
 

Common stock:
 
 

 
 

 
 

Public utilities
 
9,106

 
10,080

 
10,080

Banks, trust and insurance companies
 
23,622

 
23,696

 
23,696

Industrial, miscellaneous and all other
 
149,263

 
161,013

 
161,013

Total common stock, available-for-sale
 
181,991

 
194,789

 
194,789

 
 
 
 
 
 
 
Preferred stock:
 
 
 
 
 
 
Banks, trust and insurance companies
 
11,825

 
12,262

 
12,262

Total preferred stock, available-for-sale
 
11,825

 
12,262

 
12,262

            Total equity securities, available-for-sale
 
193,816

 
207,051

 
207,051

Short-term investments
 
194,819

 
194,819

 
194,819

Other investments
 
77,842

 
 

 
77,842

Total investments
 
$
5,020,045

 
 

 
5,089,269


See accompanying Report of Independent Registered Public Accounting Firm in Item 8. "Financial Statements and Supplementary Data." of this Form 10-K.