Stock Compensation Plan (Tables)

3 Months Ended

Mar. 31, 2015

Stock Compensation Plans.

Schedule of stock-based compensation expense and related income tax benefits

	Three Months Ended March 31,
	2015			2014
Stock-based compensation expense	$	1.9		$	1.4
Income tax benefit	(0.7		)	(0.5		)
Stock-based compensation, net of Income tax benefit	$	1.2		$	0.9

Schedule of total compensation costs related to the Company's equity awards and amounts recognized

	Stock Options and SARs		Performance Shares and Restricted Stock
Unrecognized compensation cost — December 31, 2014	$ 1.1		$ 2.2
Grant date fair value of current year grants	1.4		2.1
Compensation expense recognized	(0.9	)	(1.0	)
Unrecognized compensation cost —March 31, 2015	$ 1.6		$ 3.3
Expected amortization period (in years)	2.2		2.2

Schedule of stock options awarded

Options granted	87,900
Per share weighted average exercise price	$	59.72
Per share weighted average grant date fair value	$	16.47

Schedule of assumptions used to determine the grant date fair value of options granted

Expected term in years	5.8
Risk free interest rate	1.4	%
Volatility	34.4	%
Dividend yield	2.0	%

Schedule of stock options and SARs vested during the period

Options vested	89,600
Aggregate grant date fair value of Options vested	$	0.9

Schedule of outstanding stock options and SARs

	March 31, 2015		December 31, 2014
Options vested or expected to vest	619,500		601,100
Aggregate intrinsic value	$	19.7	$	20.3
Per share weighted average grant date fair value	$	30.78	$	26.46
Exercisable Options	314,600		292,900
Aggregate intrinsic value	$	12.4	$	11.4
Unvested Options	309,500		311,100
Per share weighted average grant date fair value	$	12.17	$	10.37