Share-Based Compensation and Employee Ownership Plans Stock Options (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Equity Plans		Dec. 31, 2011 Equity Plans
Shares Subject to Option
Balance outstanding, beginning of period, shares				866,428		893,432
Options granted, shares				0		0
Options acquired, shares				0		0
Options expired, shares				(92,665)		(27,004)
Balance outstanding, end of period, shares				773,763		866,428
Options exercisable, shares				623,760		716,429
Weighted Average Exercise Price/Share
Balance outstanding, beginning of period, in dollars per share				$ 12.95		$ 13.04
Options granted, in dollars per share				$ 0.00		$ 0.00
Options acquired, in dollars per share				$ 0.00		$ 0
Options expired, in dollars per share				$ 16.00		$ 16.00
Balance outstanding, end of period, in dollars per share				$ 12.58		$ 12.95
Options exercisable, in dollars per share				$ 14.66		$ 14.83
Weighted average remaining term, options outstanding	1 year 7 months 21 days	2 years 6 months 11 days	3 years 6 months
Weighted average remaining term, options exercisable	11 months 9 days	1 year 10 months 21 days
Aggregate Intrinsic Value
Balance outstanding, beginning of period				$ 0	[1]
Balance outstanding, end of period				0	[1]	0	[1]
Options exercisable				$ 0	[1]	$ 0	[1]
Closing stock price, in dollars per share	$ 2.45	$ 2.59

[1] Based on the Company's closing stock price of $2.45 on December 31, 2012 and $2.59 on December 31, 2011.