Share-Based Compensation and Employee Ownership Plans Stock Options (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
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		$ 3.81	$ 3.83
Equity Plans
Shares Subject to Option
Balance outstanding, beginning of period, shares		16,667
Options granted, shares		0
Options exercised, shares		0
Options expired, shares		0
Balance outstanding, end of period, shares		16,667	16,667
Options exercisable, shares		16,667
Weighted Average Exercise Price/Share
Balance outstanding, beginning of period, in dollars per share		$ 4.89
Options granted, in dollars per share		0.00
Options exercised, in dollars per share		0.00
Options expired, in dollars per share		0.00
Balance outstanding, end of period, in dollars per share		4.89	$ 4.89
Options exercisable, in dollars per share		$ 4.89
Weighted average remaining term, options outstanding		10 months 6 days	1 year 1 month 6 days
Weighted average remaining term, options exercisable		10 months 6 days
Aggregate Intrinsic Value
Balance outstanding, end of period	[1]	$ 0
Options exercisable	[1]	$ 0

[1] Based on the Company's closing stock price of $3.81 on March 31, 2016 and $3.83 on December 31, 2015.