Share-Based Compensation (Details 2) (Stock Options, USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Stock Options
Stock options outstanding
Balance at the beginning of the period (in shares)	27,595
Exercised (in shares)	(5,000)
Terminated/Cancelled (in shares)	(16,224)
Balance at the end of the period (in shares)	6,371	27,595
Exercisable at the end of the period (in shares)	6,371
Stock options, weighted average exercise price
Balance at the beginning of the period (in dollars per share)	$ 28.64
Exercised (in dollars per share)	$ 21.09
Terminated/Cancelled (in dollars per share)	$ 33.94
Balance at the end of the period (in dollars per share)	$ 21.09	$ 28.64
Exercisable at the end of the period (in dollars per share)	$ 21.09
Stock options, Weighted average remaining contractual term
Balance at the beginning of the period	6 months	7 months 13 days
Balance at the end of the period	6 months	7 months 13 days
Exercisable at the end of the period	6 months
Aggregate intrinsic value of outstanding options and exercisable options	$ 87
Total intrinsic value of options exercised	72	1,400	2,000
Related income tax benefit recognized	$ 26	$ 500	$ 600