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Equity Investments And Membership Interests In Joint Ventures (Tables)
6 Months Ended
Jun. 30, 2013
Equity Method Investments and Joint Ventures [Abstract]  
Schedule Of Equity Method Investments
 
In thousands
 
Knight Hawk
 
DKRW
 
DTA
 
Tenaska
 
Millennium
 
Tongue River
 
Total
Balance at December 31, 2012
 
$
149,063

 
$
15,515

 
$
15,462

 
$
15,264

 
$
32,214

 
$
14,697

 
$
242,215

Advances to affiliates, net
 
(3,713
)
 

 
1,944

 

 
3,441

 
1,821

 
3,493

Equity in comprehensive income (loss)
 
7,812

 
(1,241
)
 
(2,629
)
 

 
(1,347
)
 
(281
)
 
2,314

Impairment of equity investment
 

 

 

 
(15,264
)
 

 

 
(15,264
)
Balance at June 30, 2013
 
$
153,162

 
$
14,274

 
$
14,777

 
$

 
$
34,308

 
$
16,237

 
$
232,758

Notes receivable from investees:
 
 

 
 

 
 

 
 

 
 

 
 

 
 

Balance at December 31, 2012
 
$

 
$
38,680

 
$

 
$
5,148

 
$

 
$

 
$
43,828

Balance at June 30, 2013
 
$

 
$
42,501

 
$

 
$

 


 
$

 
$
42,501