Share-Based Compensation and Employee Ownership Plans Stock Options (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013		Dec. 31, 2012
Weighted Average Exercise Price/Share
Weighted average remaining term, options outstanding	1 year 4 months 23 days		1 year 7 months 6 days
Weighted average remaining term, options exercisable	11 months 3 days
Aggregate Intrinsic Value
Closing stock price, in dollars per share	$ 2.82		$ 2.45
Equity Plans
Shares Subject to Option
Balance outstanding, beginning of period, shares	773,763,000
Options granted, shares	0
Options acquired, shares	0
Options expired, shares	0
Balance outstanding, end of period, shares	773,763,000
Options exercisable, shares	673,761,000
Weighted Average Exercise Price/Share
Balance outstanding, beginning of period, in dollars per share	$ 12.58
Options granted, in dollars per share	$ 0.00
Options acquired, in dollars per share	$ 0.00
Options expired, in dollars per share	$ 0.00
Balance outstanding, end of period, in dollars per share	$ 12.58
Options exercisable, in dollars per share	$ 13.93
Aggregate Intrinsic Value
Balance outstanding, beginning of period	$ 0	[1]
Balance outstanding, end of period	0	[1]
Options exercisable	$ 0	[1]

[1] Based on the Company's closing stock price of $2.82 on March 31, 2013 and $2.45 on December 31, 2012.