Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan

The following table summarizes the benefit obligations for the SERPs and Agents Non-Qualified Plan as of December 31, 2016 and 2015:

	Year Ended December 31,
	2016			2015
Change in benefit obligation:
Benefit obligation, January 1	$	88.1		$	96.6
Interest cost	4.1			4.1
Benefits paid	(5.3		)	(5.3		)
Actuarial (gains) losses on obligation	0.6			(7.3		)
Benefit obligation, December 31	$	87.5		$	88.1

Schedule of Amounts Recognized in Consolidated Balance Sheets

Amounts recognized on the Consolidated Balance Sheets in Other liabilities and in AOCI were as follows as of December 31, 2016 and 2015:

	December 31,
	2016			2015
Accrued benefit cost	$	(87.5	)	$	(88.1	)
Accumulated other comprehensive income (loss):
Prior service cost (credit)	(2.5		)	(3.7		)
Net amount recognized	$	(90.0	)	$	(91.8	)

Schedule of Weighted Average Assumptions Used

The weighted-average assumptions used in calculating the net pension cost were as follows:

	2016		2015		2014
Discount rate	4.81	%	4.36	%	4.95	%
Rate of compensation increase	4.00	%	4.00	%	4.00	%

The weighted-average assumptions used in the measurement of the December 31, 2016 and 2015 benefit obligation for the SERPs and Agents Non-Qualified Plan, were as follows:

	2016		2015
Discount rate	4.55	%	4.81	%
Rate of compensation increase	4.00	%	4.00	%

Schedule of Net Periodic Benefit Costs

Net Periodic Benefit Costs

Net periodic benefit costs for the SERPs and Agents Non-Qualified Plan were as follows for the years ended December 31, 2016, 2015 and 2014:

	Year Ended December 31,
	2016			2015			2014
Interest cost	$	4.1		$	4.1		$	4.0
Amortization of prior service cost (credit)	(1.2		)	(1.2		)	(1.2		)
Net (gain) loss recognition	0.6			(7.3		)	13.3
Net periodic (benefit) cost	$	3.5		$	(4.4	)	$	16.1