Common Stock And Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		12 Months Ended
	Jul. 30, 2018	Dec. 31, 2018
Equity [Abstract]
Shares of common stock sold in public offering (in shares)	4,025,000
Procceds from public offering, net	$ 205,000
Underwriting discounts and commissions	12,000
Other direct costs incurred	$ 366	$ 366