Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Reclassification from AOCI to retained earnings			$ 19
Reclassification due to Accounting Standard Update (ASU 2018-02)	$ (196)	$ 0	$ 19	$ 196