XML 120 R38.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Borrowings Under Credit Facilities and Commercial Paper Program (Tables)
 12 Months Ended
Dec. 31, 2019
Line of Credit Facility [Abstract]  
Aggregate Borrowings Under Unsecured Revolving Credit Facility and Commercial Paper Program
The following information relates to aggregate borrowings under the primary unsecured revolving credit facility and commercial paper program for the periods presented (dollars in thousands):
 
 
Year Ended December 31,
 
 
2019
 
2018
 
2017
Balance outstanding at year end
 
$
1,588,600

 
$
1,147,000

 
$
719,000

Maximum amount outstanding at any month end
 
$
2,880,000

 
$
2,148,000

 
$
1,010,000

Average amount outstanding (total of daily principal balances
 
 
 
 
 
 
divided by days in period)
 
$
1,376,813

 
$
950,581

 
$
597,422

Weighted-average interest rate (actual interest expense divided
 
 
 
 
 
 
by average borrowings outstanding)
 
2.84
%
 
3.07
%
 
2.02
%