Stockholders' Equity - Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	$ 1,258,905	$ 1,293,813
OTHER COMPREHENSIVE INCOME, NET OF TAX	13,394	17,523
Balance	1,056,181	1,213,187
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(83,535)	(155,204)
Other comprehensive income (loss) before reclassifications	17,346	16,932
Adjustments for items reclassified to earnings, net of tax	0
OTHER COMPREHENSIVE INCOME, NET OF TAX	17,346	16,932
Balance	(66,189)	(138,272)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(148,984)	(159,020)
Other comprehensive income (loss) before reclassifications	(5,014)	(495)
Adjustments for items reclassified to earnings, net of tax	1,062	1,086
OTHER COMPREHENSIVE INCOME, NET OF TAX	(3,952)	591
Balance	(152,936)	(158,429)
AOCI Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(232,519)	(314,224)
Other comprehensive income (loss) before reclassifications	12,332	16,437
Adjustments for items reclassified to earnings, net of tax	1,062	1,086
OTHER COMPREHENSIVE INCOME, NET OF TAX	13,394	17,523
Balance	(219,125)	(296,701)
AOCI Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(1)	(2)
Other comprehensive income (loss) before reclassifications	0
Adjustments for items reclassified to earnings, net of tax	0
OTHER COMPREHENSIVE INCOME, NET OF TAX	0
Balance	(1)	(2)
Accumulated Other Comprehensive Income (Loss), Net of Tax [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance	(232,518)	(314,222)
Other comprehensive income (loss) before reclassifications	12,332	16,437
Adjustments for items reclassified to earnings, net of tax	1,062	1,086
OTHER COMPREHENSIVE INCOME, NET OF TAX	13,394	17,523
Balance	$ (219,124)	$ (296,699)