Borrowing Arrangements (Tables)
 12 Months Ended
Dec. 31, 2015
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
The following is a summary of our term loans and other debt as of December 31, 2015 (in thousands):
Unsecured revolving credit facility
 
$
143,000

Unsecured term loan due 2017
 
600,000

Unsecured term loan due 2020
 
800,000

Total
 
1,543,000

Unamortized debt issuance costs
 
18,137

Term loans and other debt
 
$
1,524,863