Stock-Based Compensation Range of Assumptions for Estimating Fair Values of SARs (Details) (Amended and Restated 2004 Omnibus Stock Plan, Stock Appreciation Rights [Member], USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	0.72%
Expected life of SARs	4 years 3 months 18 days	4 years 6 months	4 years 10 months 24 days
Expected stock price volatility	56.00%
Expected dividend yield	3.47%
Weighted-average fair value at grant date (per share)	$ 5.20
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate		0.87%	1.44%
Expected stock price volatility		54.00%	52.00%
Expected dividend yield		2.71%	3.23%
Weighted-average fair value at grant date (per share)		3.22	4.39
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate		2.37%	2.33%
Expected stock price volatility		60.00%	53.00%
Expected dividend yield		4.97%	3.92%
Weighted-average fair value at grant date (per share)		8.13	5.75