Stock-Based Compensation Plans (Tables)

12 Months Ended

Dec. 31, 2012

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

Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

The following table provides additional information concerning stock options, and restricted stock activity including performance-based and market-based shares:

	Year Ended December 31,
Stock Options	2012		2011		2010
Weighted-average grant date fair value of options granted	$	—	$	—	$	3.05
Total fair value of options that vested (in thousands)	$	6,787	$	1,189	$	1,393
Total intrinsic value of options exercised (in thousands)	$	6,356	$	2,616	$	525
Restricted Stock
Weighted-average grant date fair value	$	16.75	$	13.79	$	9.26
Total fair value of restricted shares that vested (in thousands)	$	5,099	$	1,240	$	1,365

The following table summarizes activity in stock options and restricted stock awards, including performance-based and market-based shares:

	Stock Option Shares		Weighted Average Exercise Price		Restricted Stock		Weighted-Average Grant Date Fair Value
Outstanding at December 31, 2011	3,202,229		$	18.95	418,730		$	12.36
Granted	—		$	—	320,597		$	16.75
Exercised	(906,850	)	$	12.88	(375,402	)	$	13.58
Forfeited	(7,434	)	$	12.22	(10,203	)	$	12.88
Expired	(295,245	)	$	25.82	—		—
Outstanding at December 31, 2012	1,992,700		$	20.72	353,722		14.03

The following table summarizes the weighted-average assumptions used to determine the awards grant date fair value:

	Year Ended December 31,
Stock Options	2012			2011			2010
Dividend yield	—		%	—		%	4.09		%
Expected volatility	—		%	—		%	41.55		%
Risk-free interest rates	—		%	—		%	2.13		%
Expected life (years)	—			—			4.6
Restricted Shares and Performance-Based Shares
Expected quarterly dividends per share	$	0.145		$	0.125		$	0.125
Risk-free interest rate	1.22		%	1.35		%	1.49		%
Market-Based Shares
Dividend yield	3.45		%	—			—
Expected volatility	43.98		%	—			—
Risk-free interest rate	1.04		%	—			—