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Stockholders' Equity - Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance     $ 1,258,905 $ 1,293,813
Other comprehensive income (loss) before reclassifications $ (7,813) $ 15,033 (30,634) 49,028
Adjustments for items reclassified to earnings, net of tax 949 1,081 2,788 3,523
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (6,864) 16,114 (27,846) 52,551
Balance 1,121,585 1,368,475 1,121,585 1,368,475
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (109,642) (112,105) (83,535) (155,204)
Other comprehensive income (loss) before reclassifications (8,676) 19,748 (34,783) 62,847
Adjustments for items reclassified to earnings, net of tax 0   0  
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (8,676) 19,748 (34,783) 62,847
Balance (118,318) (92,357) (118,318) (92,357)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (143,859) (165,682) (148,984) (159,020)
Other comprehensive income (loss) before reclassifications 863 (4,715) 4,149 (13,819)
Adjustments for items reclassified to earnings, net of tax 949 1,081 2,788 3,523
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX 1,812 (3,634) 6,937 (10,296)
Balance (142,047) (169,316) (142,047) (169,316)
AOCI Attributable to Noncontrolling Interest        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (2) (2) (1) (2)
Other comprehensive income (loss) before reclassifications 2 2 1 2
Adjustments for items reclassified to earnings, net of tax 0      
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX 2 2 1 2
Accumulated Other Comprehensive Income (Loss), Net of Tax [Member]        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (253,499) (277,785) (232,518) (314,222)
Other comprehensive income (loss) before reclassifications (7,815) 15,031 (30,635) 49,026
Adjustments for items reclassified to earnings, net of tax 949 1,081 2,788 3,523
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX (6,866) 16,112 (27,847) 52,549
Balance (260,365) (261,673) (260,365) (261,673)
AOCI Including Portion Attributable to Noncontrolling Interest        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Balance (253,501) (277,787) (232,519) (314,224)
Balance $ (260,365) $ (261,673) $ (260,365) $ (261,673)