Discontinued Operations and Assets Held for Sale - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Feb. 04, 2020	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Feb. 03, 2020
Schedule Of Disposal Group Not Discontinued Operation Income Statement [Line Items]
Gain on sale of foundry services group business				$ 287,117
MX Foundry Services Group [Member]
Schedule Of Disposal Group Not Discontinued Operation Income Statement [Line Items]
Gain on sale of foundry services group business	$ 287,117
Foundry Services Group And Fab Four [Member]
Schedule Of Disposal Group Not Discontinued Operation Income Statement [Line Items]
Restructuring and other charges		$ 7,870	$ 763	$ 10,574	$ 2,636
Restructuring related charge					$ 2,151
Foundry Services Group And Fab Four [Member] | MX Foundry Services Group [Member]
Schedule Of Disposal Group Not Discontinued Operation Income Statement [Line Items]
Accounts receivable from transaction services agreement						$ 2,484