Share Based Compensation - Stock Options Activity (Details) (Stock Options, USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options
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	5.70%	0.00%	0.00%
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options	$ 200,000	$ 900,000	$ 300,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	100,000	900,000	100,000
Number of Shares [Roll Forward]
Options outstanding at December 31, 2011 (shares)	856
Options exercisable at December 31, 2011 (shares)	501
Options granted (shares)	750
Options forfeited (shares)	(45)
Options expired (shares)	(5)
Options exercised (shares)	(98)
Options outstanding at December 31, 2012 (shares)	1,458	856
Options exercisable at December 31, 2012 (shares)	553	501
Weighted Average Exercise Price per Share [Roll Forward]
Options outstanding at December 31, 2011 - Weighted Average Exercise Price per Share (US$ per share)	$ 1.93
Options exercisable at December 31, 2011 - Weighted Average Exercise Price per Share (US$ per share)	$ 1.75
Options granted - Weighted Average Exercise Price per Share (US$ pre share)	$ 3.38
Options forfeited - Weighted Average Exercise Price per Share (US$ per share)	$ 3.21
Options expired - Weighted Average Exercise Price per Share (US$ per share)	$ 6.98
Options exercised - Weighted Average Exercise Price per Share (US$ per share)	$ 1.92
Options outstanding at December 31, 2012 - Weighted Average Exercise Price per Share (US$ per share)	$ 2.62	$ 1.93
Options exercisable at December 31, 2012 - Weighted Average Exercise Price per Share (US$ per share)	$ 1.82	$ 1.75
Options outstanding - Weighted Average Remaining Contractual Term (in years)	5 years
Options exercisable - Weighted Average Remaining Contractual Term (in years)	3 years 4 months 12 days
Options outstanding at December 31, 2012 - Aggregate Intrinsic Value	2,537,000
Options exercisable at December 31, 2012 - Aggregate Intrinsic Value	$ 1,403,000