10. EARNINGS PER-SHARE

The number of shares used to compute basic and diluted earnings per-share for the three and nine months ended September 30, 2017 and 2016, was as follows:


	Three Months Ended September 30, 2017					Nine Months Ended September 30, 2017
			Weighted-	Per				Weighted-	Per
			Average	Common				Average	Common
	Net		Common	Share		Net		Common	Share
(In millions, except per-share amounts)	Income		Shares	Amount		Income		Shares	Amount
Basic:	$	34.1	42.9	$	0.79	$	65.1	43.0	$	1.51
Effect of Dilutive Securities:			0.3		—			0.3		(0.01)
Diluted:	$	34.1	43.2	$	0.79	$	65.1	43.3	$	1.50


	Three Months Ended September 30, 2016					Nine Months Ended September 30, 2016
			Weighted-	Per				Weighted-	Per
			Average	Common				Average	Common
	Net		Common	Share		Net		Common	Share
(In millions, except per-share amounts)	Income		Shares	Amount		Income		Shares	Amount
Basic:	$	25.3	42.8	$	0.59	$	61.4	43.1	$	1.42
Effect of Dilutive Securities:			0.4		—			0.4		(0.01)
Diluted:	$	25.3	43.2	$	0.59	$	61.4	43.5	$	1.41

Basic earnings per-share is determined by dividing net income by the weighted-average common shares outstanding during the period. The calculation of diluted earnings per-share includes the dilutive effect of unexercised non-qualified stock options and non-vested restricted stock units.

The computation of weighted-average dilutive shares outstanding excludes certain non-qualified stock options to purchase shares of common stock where the options’ exercise prices were greater than the average market price of the Company’s common stock for the periods presented and, therefore, the effect would be anti-dilutive. The number of such shares excluded was nominal.