Net Income per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Reconciliation of Basic to Diluted Net Income per Share

The following is a reconciliation of basic to diluted net income per share:

	Quarter Ended
	March 31, 2019		March 31, 2018
Net income	$	35.2	$	9.0
Shares used in net income per common share - basic		64.2		29.1
Incremental shares of unvested restricted common stock		0.2		0.1
Shares used in net income per common share - diluted		64.4		29.2
Earnings per share:
Basic net income	$	0.55	$	0.31
Diluted net income	$	0.55	$	0.31