Severance and Other Termination Benefits (Narrative) (Details) - One-time Termination Benefits [Member] - Impact of COVID -19 [Member] $ in Thousands			3 Months Ended
	May 04, 2020 employee	Apr. 01, 2020 USD ($) employee	Mar. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
One-time cash severance costs			$ 3,600
General and Administrative Expense [Member]
Restructuring Cost and Reserve [Line Items]
One-time cash severance costs			$ 1,300
Subsequent Events [Member]
Restructuring Cost and Reserve [Line Items]
Number of workforce reduced | employee	50	80
One-time cash severance costs		$ 3,600