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Business Combinations and Other Transactions - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Business Acquisition [Line Items]
Actual revenue	$ 72,523			$ 75,079			$ 216,763	$ 232,078
Actual earnings	$ 2,234	$ 7,743	$ (2,803)	$ 21,752	$ 10,966	$ 30,230	$ 7,174	$ 62,948
Actual diluted earnings per share (in usd per share)	$ 0.07			$ 0.61			$ 0.22	$ 1.77
Technicolor
Business Acquisition [Line Items]
Supplemental pro forma revenue				$ 76,034				$ 238,761
Supplemental pro forma earnings				$ 22,884				$ 55,314
Actual diluted earnings per share (in usd per share)								$ 1.77
Supplemental pro forma diluted earnings per share (in usd per share)				$ 0.64				$ 1.55

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