Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2013

Stockholders' Equity Note [Abstract]

Schedule of Share-based Compensation, Restricted Stock Activity

The following table presents restricted stock activity for the years 2013, 2012 and 2011:



	2013				2012				2011
	# of Shares		Weighted Average Fair Value at Date of Grant		# of Shares		Weighted Average Fair Value at Date of Grant		# of Shares		Weighted Average Fair Value at Date of Grant
Nonvested restricted shares outstanding at January 1	433,382		$	18.94	359,306		$	13.79	1,078,628		$	10.45
Granted	274,172		36.47		137,026		29.56		654,120		11.47
Forfeited	(42,711	)	33.71		—		—		(7,000	)	10.40
Vested	(346,282	)	15.33		(62,950	)	12.84		(1,366,442	)	10.06
Nonvested restricted shares outstanding at December 31	318,561		$	35.82	433,382		$	18.94	359,306		$	13.79

Reconciliation of the Common and Potential Common Shares Outstanding Used in Earnings Per Share Calculation

A reconciliation of the average number of common and potential common shares outstanding used in the calculations of basic and diluted net income per share follows ($ in millions, shares in thousands):



	For the Years Ended December 31,
	2013			2012			2011
Numerator (basic and diluted):
Net income	$	76.1		$	79.8		$	92.6
Less: Dividends paid to participating securities	(0.2		)	(0.2		)	(0.1		)
Less: Undistributed earnings available to participating securities	(0.4		)	(0.9		)	(1.1		)
Undistributed and distributed earnings available to common stockholders	$	75.5		$	78.7		$	91.4

Denominator:
Average number of common shares outstanding	31,056.7			30,986.2			33,230.2
Effect of dilutive stock-based compensation	181.6			355.7			256.6
Average number of common and potential common shares outstanding	31,238.3			31,341.9			33,486.8