Condensed Consolidated Statements of Cash Flows Supplemental Information - Summary of Depreciation and Amortization (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Summary of Depreciation and amortization
Film assets	$ 2,494	$ 2,975
Property, plant and equipment:
Equipment supporting joint revenue sharing arrangements	5,743	6,932
Other property, plant and equipment	2,476	2,900
Other intangible assets	1,471	1,661
Other assets	494	651
Deferred financing costs	308	133
Depreciation and amortization	$ 12,986	$ 15,252