Stock-Based Compensation Plans (Aggregate Activity Under Stock Option Plans) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Stock-Based Compensation Plans Aggregate Activity Under Stock Option Plans Details
Options outstanding at beginning of year	7,390,000
Options granted	2,178,000
Options exercised	2,522,000
Options forfeited/expired	390,000
Options outstanding at December 31, 2013	6,656,000
Weighted-average exercise price of options outstanding, beginning of year	$ 6.75
Weighted-average exercise price of options granted during period	$ 10.69
Weighted-average exercise price of options exercised during the period	$ 5.76
Weighted-average exercise price of options forfeited/expired during the period	$ 13.29
Weighted-average exercise price of options outstanding, at December 31, 2013	$ 8.03
Weighted-average remaining contractual term of options outstanding, at December 31, 2013	7 years 179 days
Aggregate intrinsic value of options outstanding, at December 31, 2013	$ 148,651
Options Vested and Expected to Vest, Number of Shares	6,264,000
Options Vested and Expected to Vest, Weighted-Average Exercise Price Per Share	$ 7.87
Options Vested and Expected to Vest, Weighted-Average Remaining Contractual Term	7 years 146 days
Options Vested and Expected to Vest, Aggregate Intrinsic Value	140,880
Options Exercisable, Number of Shares	2,690,000
Options Exercisable, Weighted-Average Exercise Price Per Share	$ 6.69
Options Exercisable, Weighted-Average Remaining Contractual Term	6 years 18 days
Options Exercisable, Aggregate Intrinsic Value	$ 63,690