XML 31 R81.htm IDEA: XBRL DOCUMENT v3.3.0.814
Commitments and Contingent Liabilities (Credit Facility) (Details) - USD ($)
$ in Thousands
 9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Credit Facility One Hundred Million [Member]    
Line Of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 100,000  
Maturity Date June 2016  
Amount Utilized [1] $ 71,364 $ 81,747
Basis Of Fees Fixed  
Credit Facility Fifty Three Million [Member]    
Line Of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity [2] $ 76,310  
Maturity Date November 2015  
Amount Utilized [1] $ 73,200 74,623
Basis Of Fees Fixed  
Credit Facility 270 Million [Member]    
Line Of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 270,000  
Maturity Date November 2017  
Amount Utilized [1] $ 270,000 270,000
Basis Of Fees Fixed  
Credit Facility 120 Million [Member]    
Line Of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 120,000  
Maturity Date June 2019  
Amount Utilized [1] $ 80,040 80,040
Basis Of Fees Fixed  
Credit Facility 850 Million [Member]    
Line Of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity $ 850,000  
Maturity Date September 2019  
Amount Utilized $ 297,890 [1] 204,774
Basis Of Fees Senior unsecured long-term debt rating  
Credit Facility One Hundred Fifty Million [Member]    
Line Of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity [2] $ 38,535  
Maturity Date March 2019  
Amount Utilized [1] $ 53,030 80,961
Basis Of Fees Fixed  
Credit Facility Forty Seven Million [Member]    
Line Of Credit Facility [Line Items]    
Line of Credit Facility, Maximum Borrowing Capacity [2] $ 51,892  
Maturity Date May 2018  
Amount Utilized [1] $ 35,090 $ 28,612
Basis Of Fees Fixed  
[1] Represents issued but undrawn letters of credit. There was no cash borrowed for the periods presented.
[2] Foreign currency facility, amounts presented are in U.S. dollars.