Income Taxes Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2016
Unrecognized Tax Benefits			$ 0
Restricted Stock Expense, Tax Benefit	$ 100
Effect of ASU Adoption [Member]
Cumulative effect of adoption of ASU 2018-02			0	$ 0
Effect of ASU Adoption [Member] | Retained Earnings [Member]
Cumulative effect of adoption of ASU 2018-02		$ 1,344	$ 1,344