Share-Based Compensation and Employee Ownership Plans Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
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%
Aggregate Intrinsic Value
Closing stock price, in dollars per share		$ 4.56		$ 4.80
Equity Plans
Shares Subject to Option
Balance outstanding, beginning of period, shares		216,672
Options granted, shares		0
Options exercised, shares		(100,002)
Options expired, shares		(100,003)
Balance outstanding, end of period, shares		16,667
Options exercisable, shares		16,667
Weighted Average Exercise Price/Share
Balance outstanding, beginning of period, in dollars per share		$ 5.65
Options granted, in dollars per share		0.00
Options exercised, in dollars per share		3.96
Options expired, in dollars per share		7.49
Balance outstanding, end of period, in dollars per share		4.89
Options exercisable, in dollars per share		$ 4.89
Weighted average remaining term, options outstanding		1 year 4 months 6 days	1 year 7 months 6 days
Weighted average remaining term, options exercisable		1 year 4 months 6 days
Aggregate Intrinsic Value
Balance outstanding, beginning of period	[1]	$ 87
Balance outstanding, end of period	[1]	0
Options exercisable	[1]	$ 0

[1] Based on the Company's closing stock price of $4.56 on September 30, 2015 and $4.80 on December 31, 2014.