Shareholders' Equity Share-based Compensation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based incentive plan, number of shares authorized for issuance	2,500,000
Share-based incentive plan, number of shares remaining for issuance	994,096
Total share-based compensation expense	$ 2,965	$ 2,719
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 7 months 27 days
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value	$ 2,167	$ 3,703
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options
Restricted stock outstanding as of beginning of the period	731,809	520,987	[1]
Restricted stock granted during the period	263,829	457,538
Restricted stock vested during the period	(299,041)	(246,716)
Restricted stock outstanding as of end of the period	696,597	731,809
Nonvested restricted stock, fair value remaining to be amortized	$ 3,497

[1] (1) The beginning balance shown for the year ended December 31, 2014 has been adjusted from amount previously disclosed to correct computational errors relating to vesting terms on grants made in the first quarter of 2013.