Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2015

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-based compensation expense was as follows:



For the periods ended December 31,	2015		2014		2013
Founders	$	5.2	$	5.4	$	5.3
2013 Grants	1.2		1.2		0.9
2014 Grants	3.0		3.7		—
2015 Grants	5.0		—		—
Total	$	14.4	$	10.3	$	6.2

Schedule of Restricted Stock Awards Activity

The following table summarizes the unvested restricted stock activity and the weighted average fair value of these shares at the date of grant for the year ended December 31, 2015:



For the year ended December 31,	2015
	Shares		Weighted Average Grant Date Fair Value
Non-vested at January 1	1,739,642		$	20.20
Granted	571,224		23.80
Vested	(458,606	)	20.90
Forfeited	(266,779	)	21.80
Non-vested at December 31	1,585,481		$	20.99

Schedule of Unvested Stock Options

The following table summarizes the stock option activity for the year ended December 31, 2015:



For the year ended December 31,	2015
	Options		Weighted Average Exercise Price
Outstanding at January 1	166,872		$	23.58
Granted	223,186		28.44
Exercised	(2,525	)	23.58
Forfeited or expired	(53,554	)	25.98
Outstanding at December 31	333,979		26.44
Exercisable at December 31	78,806		25.75
Vested and expected to vest	78,806		$	25.75

Schedule of Option Valuation Assumptions

The following table summarizes the stock option assumptions for the years ended December 31, 2015, 2014, and 2013:



	Options Outstanding		Options Exercisable		Assumption Range
Exercise Prices	Number of Shares	Weighted Average Remaining Contractual Terms (Years)	Number of Shares	Weighted Average Remaining Contractual Terms (Years)	Risk-Free Interest Rate	Expected Annual Dividend Yield	Expected Terms in Years	Expected Volatility
2013
$23.58	168,963	9.3	—	0.0	0.92%	3.4%	6.0	35%
2014
$23.58	166,872	8.3	13,915	8.3	0.92%	3.4%	6.0	35%
2015
$23.58	142,556	7.3	43,460	7.3	0.92%	3.4%	6.0	35%
$28.42	178,704	9.1	35,346	9.1	1.6% - 1.75%	4.4%	5.5-6.5	32.5% - 37.5%
$30.74	12,719	9.6	—	0.0	1.6% - 1.75%	4.4%	5.5-6.5	32.5% - 37.5%