Stock Repurchases (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Nov. 23, 2015
Equity, Class of Treasury Stock [Line Items]
Increase in number of shares authorized for repurchase				1,000,000
Remaining number of shares authorized for repurchase		815,150
Common stock repurchased, shares		215,968	6,065
Common stock repurchased, value		$ 40.8	$ 1.1
Open Market [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased, shares		45,300	0
Common stock repurchased, value		$ 7.6	$ 0.0
Other [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchased, shares	[1]	170,668	6,065
Common stock repurchased, value	[1]	$ 33.2	$ 1.1

[1] Represents shares of common stock released to us by team members as payment of tax withholdings due to us upon the vesting of restricted stock and restricted stock units and the conversion of restricted stock units to common stock.