Borrowing Arrangements (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Aggregate Payments of Principal on Long-Term Borrowings

The table below presents as of December 31, 2015, the aggregate scheduled payments of principal on long-term borrowings for each of the next five years and thereafter are as follows (amounts in thousands):

Year	Amount
2016	$	119,122
2017	97,531
2018	230,046
2019	231,393
2020	348,413
Thereafter	1,110,362
Net unamortized premiums	8,846
Total	$	2,145,713