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Ownership Interests in and Advances to Partner Companies and Funds (Tables)
 9 Months Ended
Sep. 30, 2015
Investments in and Advances to Affiliates, Schedule of Investments [Abstract]  
Ownership Interests in and Advances to Partner Companies and Private Equity Funds
The following summarizes the carrying value of the Company’s ownership interests in and advances to partner companies.
   
   
September 30, 2015
 
December 31, 2014
   
(Unaudited - In thousands)
Equity Method:
   
 
 
Partner companies
$
143,906

 
$
134,861

Private equity funds
1,030

 
1,128

   
144,936

 
135,989

Cost Method:
   
 
 
Partner companies
5,024

 
6,774

Private equity funds
2,050

 
2,364

   
7,074

 
9,138

Advances to partner companies
10,978

 
9,065

   
$
162,988

 
$
154,192