CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowances (in dollars)	$ 14.5	$ 13.1
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	17,073,725	16,971,634
Common stock, shares outstanding	16,205,428	16,138,983
Treasury stock, shares	868,297	832,651