Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Net income	$ (13,200)	$ 9,600
Net pension adjustments, net of tax:
Reclassification of adjustment for defined benefit plans recorded in net loss	20,600	100
Total net pension adjustments	20,600	100
Total other comprehensive income, net of tax	20,600	100
Comprehensive income	7,400	9,700
Less: Comprehensive income attributable to noncontrolling interest
Comprehensive income attributable to GlassBridge Enterprises, Inc.	$ 7,400	$ 9,700