Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2019	Sep. 30, 2019
Income tax expense reduction	[1]	$ (55)	$ 8,786
Revision of Prior Period, Adjustment
Income tax expense reduction		1,800	1,800
Valuation allowance reduction		$ 1,800	$ 1,800

[1] (1) Income tax expense (benefit) for the quarter and nine months ended September 30, 2019 includes an immaterial correction to reduce income tax expense and the valuation allowance by $1.8 million. The correction reflects the impact of 2017 tax reform associated with the application of indefinite-lived deferred taxes to properly calculate the valuation allowance.