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Other Loss (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Other Income and Expenses [Abstract]      
Tax indemnification guarantee liability $ (600) $ (50,000) $ 0
Write-off of contingent consideration 0 0 36,630
Contingent liability 0 (4,500) (61,862)
Gain on sale / (write-down) of cost-accounted investment 0 1,250 (19,000)
Loss on bond repurchases (1,772) 0 0
Miscellaneous income (loss) 359 (731) 5,219
Other loss $ (2,013) $ (53,981) $ (39,013)