Borrowing Arrangements (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Aggregate Payments of Principal on Long-Term Borrowings

The table below presents as of December 31, 2017, the aggregate scheduled payments of principal on long-term borrowings for each of the next five years and thereafter (amounts in thousands):

Year	Amount
2018	$	47,300
2019	241,158
2020	158,547
2021	248,414
2022	168,625
Thereafter	1,356,449
Net unamortized premiums	3,253
Unamortized deferred financing costs	(23,729		)
Total	$	2,200,017