Stock Based Compensation Stock Based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	2,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	982,389
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value	$ 700	$ 1,600	$ 2,200
Allocated Share-based Compensation Expense	3,200	$ 2,700	$ 2,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 7,900
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	2 years 19 days
Stock Units Awarded Under the 2009 LTIP Plan	15,000	17,500	10,500
Value of Stock Units Awarded Under the 2009 LTIP Plan	$ 300	$ 400	$ 300
Total Numbner of Units Outstanding Under the 2006 Director Equity Plan	8,059
Value of Units Outstanding Under the 2006 Director Equity Plan	$ 200
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	300	400	400
Stock or Unit Option Plan Expense	$ 0	$ 200	$ 300
Total Stock Units Outstanding Under All Stock Option Plans	47,982
Total Value of Units Outstanding Under All Stock Option Plans	$ 1,200
Deferred Compensation Equity	1,500
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Benefits	$ 1,100