Debt (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Total amortized cost of Long-term Debt, Current and Non-current, outstanding at December 31, 2016 and 2015 was:

DOLLARS IN MILLIONS	2016		2015
Senior Notes:
6.00% Senior Notes due May 15, 2017	$	359.8	$	359.1
4.35% Senior Notes due February 15, 2025	247.7		247.4
7.375% Subordinated Debentures due February 27, 2054	144.1		144.1
Total Long-term Debt, Current and Non-current, Outstanding	$	751.6	$	750.6

Schedule of Interest Expense

Interest Expense, including facility fees, accretion of discount and amortization of issuance costs, for the years ended December 31, 2016, 2015 and 2014 was:

DOLLARS IN MILLIONS	2016			2015			2014
Notes Payable under Revolving Credit Agreement	$	0.8		$	0.8		$	0.8
Federal Home Loan Bank of Dallas	—			—			—
Federal Home Loan Bank of Chicago	—			—			—
Senior Notes Payable:
6.00% Senior Notes due November 30, 2015	—			3.7			15.5
6.00% Senior Notes due May 15, 2017	22.3			22.2			22.2
4.35% Senior Notes due February 15, 2025	11.1			9.5			—
7.375% Subordinated Debentures due February 27, 2054	11.1			11.1			9.4
Interest Expense before Capitalization of Interest	45.3			47.3			47.9
Capitalization of Interest	(0.9		)	(0.8		)	(1.0		)
Total Interest Expense	$	44.4		$	46.5		$	46.9

Schedule of Interest Paid

Interest Paid, including facility fees, for the years ended December 31, 2016, 2015 and 2014 was:

DOLLARS IN MILLIONS	2016		2015		2014
Notes Payable under Revolving Credit Agreement	$	0.6	$	1.4	$	0.6
Federal Home Loan Bank of Dallas	—		—		—
Federal Home Loan Bank of Chicago	—		—		—
Senior Notes Payable:
6.00% Senior Notes due November 30, 2015	—		4.8		15.0
6.00% Senior Notes due May 15, 2017	21.6		21.6		21.6
4.35% Senior Notes due February 15, 2025	10.9		5.2		—
7.375% Subordinated Debentures due February 27, 2054	11.1		11.1		8.5
Total Interest Paid	$	44.2	$	44.1	$	45.7