Borrowing Arrangements (Tables)

12 Months Ended

Dec. 31, 2012

Aggregate Payments of Principal on Long-Term Borrowings

Aggregate payments of principal on long-term borrowings for each of the next five years and thereafter are as follows (amounts in thousands):

Year	Amount
2013	$	105,052
2014	161,160
2015	591,949
2016	238,626
2017	302,801
Thereafter	845,670
Net unamortized premiums	24,608
Total	$	2,269,866