Notes Payable (Tables)

9 Months Ended

Sep. 30, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

The amortized cost of debt outstanding at September 30, 2013 and December 31, 2012 was:

(Dollars in Millions)	Sep 30, 2013		Dec 31, 2012
Senior Notes:
6.00% Senior Notes due May 15, 2017	$	357.8	$	357.3
6.00% Senior Notes due November 30, 2015	248.9		248.6
Mortgage Note Payable due September 1, 2013	—		5.5
Total Notes Payable	$	606.7	$	611.4

Schedule of Interest Expense [Table Text Block]

Interest Expense, including facility fees, accretion of discount and write-off of unamortized issuance costs from the former credit agreement, for the nine and three months endedSeptember 30, 2013 and 2012 was:

	Nine Months Ended						Three Months Ended
(Dollars in Millions)	Sep 30, 2013			Sep 30, 2012			Sep 30, 2013			Sep 30, 2012
Notes Payable under Revolving Credit Agreements	$	0.9		$	1.6		$	0.3		$	0.3
Senior Notes Payable:
6.00% Senior Notes due May 15, 2017	16.6			16.6			5.5			5.5
6.00% Senior Notes due November 30, 2015	11.6			11.6			3.9			3.9
Mortgage Note Payable due September 1, 2013	0.2			0.3			—			0.1
Interest Expense before Capitalization of Interest	29.3			30.1			9.7			9.8
Capitalization of Interest	(0.7		)	(1.6		)	(0.2		)	(0.2		)
Total Interest Expense	$	28.6		$	28.5		$	9.5		$	9.6

Schedule of Interest Paid [Table Text Block]

Interest paid, including facility fees and credit agreement issuance costs, for the nine and three months endedSeptember 30, 2013 and 2012 was:

	Nine Months Ended				Three Months Ended
(Dollars in Millions)	Sep 30, 2013		Sep 30, 2012		Sep 30, 2013		Sep 30, 2012
Notes Payable under Revolving Credit Agreements	$	0.6	$	1.9	$	0.4	$	0.2
Senior Notes Payable:
6.00% Senior Notes due May 15, 2017	10.8		10.8		—		—
6.00% Senior Notes due November 30, 2015	7.5		7.5		—		—
Mortgage Note Payable due September 1, 2013	0.3		0.3		0.1		0.1
Total Interest Paid	$	19.2	$	20.5	$	0.5	$	0.3