Commitments: (Tables)

12 Months Ended

Dec. 31, 2012

Commitments:

Schedule of estimated minimum rental commitments for railcar leases for use at coal-fired facilities over the next five years and thereafter

As of December 31, 2012, our estimated minimum rental commitments for our railcar leases for use at our coal-fired facilities over the next five years and thereafter are as follows:

		(dollars in thousands)
2013	$	5,743
2014		5,743
2015		4,412
2016		4,412
2017		4,412
Thereafter		7,041

Schedule of estimated minimum long term commitments

For further discussion of total nuclear fuel expense, see Note 1h. As of December 31, 2012, our estimated minimum long-term commitments are as follows:

		(dollars in thousands)
		Coal		Nuclear Fuel
2013	$	78,000	$	72,000
2014		41,000		57,000
2015		–		36,900
2016		–		29,100
2017		–		26,100
Thereafter		–		138,000