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Schedule I - Parent Company Only Financial Statements - Statements of Comprehensive Income (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Condensed Financial Statements Captions [Line Items]      
Net income available to common stockholders $ 55,707 $ 197,520 $ 51,475
Other comprehensive (loss) income, net of tax:      
Foreign currency translation adjustments (86) (13,543) 15,779
Available for sale securities     (927)
Benefit plans (12,928)    
Total other comprehensive income (loss), net of tax (13,014) (13,543) 14,852
Comprehensive income (loss) attributable to common stockholders 47,070 185,834 64,188
Parent Company [Member]      
Condensed Financial Statements Captions [Line Items]      
Net income available to common stockholders 55,707 197,520 51,475
Other comprehensive (loss) income, net of tax:      
Foreign currency translation adjustments 96 (11,686) 13,536
Available for sale securities     (823)
Benefit plans (8,733)    
Total other comprehensive income (loss), net of tax (8,637) (11,686) 12,713
Comprehensive income (loss) attributable to common stockholders $ 47,070 $ 185,834 $ 64,188