Share-Based Compensation and Employee Ownership Plans Stock Options (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate	0.00%
Shares Subject to Option
Options exercised, shares	(33,334)
Weighted Average Exercise Price/Share
Weighted average remaining term, options outstanding	1 year 7 months 5 days		2 years 4 months 24 days		1 year 7 months 6 days
Weighted average remaining term, options exercisable	1 year 7 months 5 days		2 years 4 months 24 days
Aggregate Intrinsic Value
Closing stock price, in dollars per share	$ 4.80		$ 3.91
Equity Plans
Shares Subject to Option
Balance outstanding, beginning of period, shares	300,006		773,763
Options granted, shares	0		0
Options exercised, shares	(33,334)		0
Options expired, shares	(50,000)		(473,757)
Balance outstanding, end of period, shares	216,672		300,006
Options exercisable, shares	216,672		300,006
Weighted Average Exercise Price/Share
Balance outstanding, beginning of period, in dollars per share	$ 7.19		$ 12.58
Options granted, in dollars per share	$ 0.00		$ 0.00
Options exercised, in dollars per share	$ 3.50		$ 0.00
Options expired, in dollars per share	$ 16.27		$ 16.00
Balance outstanding, end of period, in dollars per share	$ 5.65		$ 7.19
Options exercisable, in dollars per share	$ 5.65		$ 7.19
Aggregate Intrinsic Value
Balance outstanding, beginning of period	$ 41	[1]	$ 0	[1]
Balance outstanding, end of period	87	[1]	41	[1]
Options exercisable	$ 0	[1]

[1] Based on the Company's closing stock price of $4.80 on December 31, 2014 and $3.91 on December 31, 2013.