Shareholders' Equity and Stock-Based Compensation Plans Options Activity (Details) (Stock Options [Member], USD $)	1 Months Ended	12 Months Ended
	Jan. 31, 2009	Dec. 31, 2011 years	Dec. 31, 2010
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Outstanding, Stock Options period start		6,432,264
Outstanding, Weighted Average Exercise Price, Period Start		$ 13.15
Granted, Stock Options	485,000	616,686	578,000
Granted, Weighted Average Exercise Price		$ 10.88
Exercised, Stock Options		(261,272)
Exercised, Weighted Average Exercise Price		$ 7.48
Forfeited, Stock Options		(116,472)
Forfeited, Weighted Average Exercise Price		$ 12.61
Expired, Stock Options		(289,048)
Expired, Weighted Average Exercise Price		$ 11.08
Outstanding, Stock Options period end		6,382,158	6,432,264
Outstanding, Weighted Average Exercise Price, Period End		$ 13.27	$ 13.15
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term		4.7
Outstanding, Aggregate Intrinsic Value		$ 2,400,000
Exercisable, Stock Options		5,294,042
Exercisable, Weighted Average Exercise Price		$ 14.01
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term		3.8
Exercisable, Aggregate Intrinsic Value		1,600,000
Number of options exercised	121,155	261,272	162,151
Total intrinsic value of options exercised	317,000	763,000	600,000
Cash received from options exercised	662,000	1,855,000	962,000
Tax deduction realized from options exercised	$ 286,000	$ 680,000	$ 466,000