XML 111 R93.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes - Deferred Income Tax Assets (Liabilities) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]    
Document Period End Date Dec. 31, 2018  
Tax credit carryforwards $ 64,895 $ 222,353
Research and development expenses 76,906 92,443
Net operating loss carryforwards 187,741 139,544
Allowances and reserves 92,068 176,248
Deferred compensation 63,641 49,616
Postretirement benefits 24,666 30,564
Intangible assets 419 6,096
Other 48,262 50,554
Gross deferred income tax assets 558,598 767,418
Intangible assets (196,012) (175,921)
Other (15,782) 0
Gross deferred income tax liabilities (211,794) (175,921)
Deferred income tax asset valuation allowances (363,720) (579,245)
Net deferred income tax (liabilities) $ (16,916)  
Net deferred income tax assets   $ 12,252