Shareholders' Equity Share-based Compensation (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based incentive plan, number of shares authorized for issuance	2,500,000		2,500,000
Share-based incentive plan, number of shares remaining for issuance	860,106		860,106
Stock-based compensation expense	$ 1	$ 782	$ 1,443	$ 1,475
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Rollforward]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition			1 year 7 months 27 days
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Rollforward]
Restricted stock outstanding as of beginning of period	547,486	696,819	696,597	731,809
Restricted stock granted	46,158	32,555	214,878	263,829
Restricted stock vested	(32,555)	(32,777)	(350,386)	(299,041)
Restricted stock outstanding as of end of period	561,089	696,597	561,089	696,597
Grant date fair value	$ 300	$ 250	$ 1,349	$ 2,167
Nonvested restricted stock, fair value remaining to be amortized	$ 3,404		$ 3,404