Stock Based Compensation Equity Compensation expense for RSUs and RSAs with Financial or other Performance based vesting requirments (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	230,000
Fair Value of Performance Awards on Grant Date	$ 1,703
Employee Service Share Based Compensation Nonvested Awards Compensation Cost Recognized Share Based Awards Other than Options	622
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	1,081
Number of non-vested equity-based payment instruments with performance condition excluding stock (or unit) options	230,000
Aug 2010 Grant Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	142,500
Fair Value of Performance Awards on Grant Date	1,058
Employee Service Share Based Compensation Nonvested Awards Compensation Cost Recognized Share Based Awards Other than Options	451
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	607
Latest Date that Performance condition could be met	April 2015
April 2011 Grant Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	17,500
Fair Value of Performance Awards on Grant Date	156
Employee Service Share Based Compensation Nonvested Awards Compensation Cost Recognized Share Based Awards Other than Options	51
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	105
Latest Date that Performance condition could be met	April 2015
May 2011 Grant Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	20,000
Fair Value of Performance Awards on Grant Date	212
Employee Service Share Based Compensation Nonvested Awards Compensation Cost Recognized Share Based Awards Other than Options	67
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	145
Latest Date that Performance condition could be met	April 2015
November 2011 Grant Date [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	50,000
Fair Value of Performance Awards on Grant Date	277
Employee Service Share Based Compensation Nonvested Awards Compensation Cost Recognized Share Based Awards Other than Options	53
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 224
Latest Date that Performance condition could be met	April 2015