Other Comprehensive Income (Loss) - Tax Effects of Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other comprehensive income (loss), Before-Tax Amount:
Before-Tax Amount	$ (49,559)	$ (69,060)	$ (16,406)	$ (103,184)
Other comprehensive income (loss), Tax Benefit (Expense):
Tax Benefit (Expense)	5,915	9,077	5,438	21,965
Other comprehensive income (loss), Net-of-Tax Amount:
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	(43,644)	(59,983)	(10,968)	(81,219)
Foreign currency translation adjustment
Other comprehensive income (loss), Before-Tax Amount:
Before-Tax Amount	(47,247)	(10,357)	(19,621)	(59,024)
Other comprehensive income (loss), Tax Benefit (Expense):
Tax Benefit (Expense)	5,245	(1,376)	5,284	14,668
Other comprehensive income (loss), Net-of-Tax Amount:
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	(42,002)	(11,733)	(14,337)	(44,356)
Ownership share of equity method investees’ other comprehensive income (loss)
Other comprehensive income (loss), Before-Tax Amount:
Before-Tax Amount	3,593	(8,051)	(3,302)	7,560
Other comprehensive income (loss), Tax Benefit (Expense):
Tax Benefit (Expense)	(931)	1,556	1,177	(1,505)
Other comprehensive income (loss), Net-of-Tax Amount:
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	2,662	(6,495)	(2,125)	6,055
Defined benefit pension and postretirement plan adjustments
Other comprehensive income (loss), Before-Tax Amount:
Before-Tax Amount	2,126	(48,463)	6,518	(43,580)
Other comprehensive income (loss), Tax Benefit (Expense):
Tax Benefit (Expense)	(136)	8,660	(425)	7,647
Other comprehensive income (loss), Net-of-Tax Amount:
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	1,990	(39,803)	6,093	(35,933)
Unrealized loss on derivative contracts
Other comprehensive income (loss), Before-Tax Amount:
Before-Tax Amount	(8,031)	(2,189)	(1)	(9,274)
Other comprehensive income (loss), Tax Benefit (Expense):
Tax Benefit (Expense)	1,737	237	(598)	1,580
Other comprehensive income (loss), Net-of-Tax Amount:
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	(6,294)	(1,952)	(599)	(7,694)
Unrealized gain on available-for-sale securities
Other comprehensive income (loss), Before-Tax Amount:
Before-Tax Amount			0	1,134
Other comprehensive income (loss), Tax Benefit (Expense):
Tax Benefit (Expense)			0	(425)
Other comprehensive income (loss), Net-of-Tax Amount:
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX			0	709
Less: Other comprehensive income (loss) attributable to noncontrolling interests
Other comprehensive income (loss), Before-Tax Amount:
Before-Tax Amount	(1,749)	(400)	(1,543)	(1,283)
Other comprehensive income (loss), Tax Benefit (Expense):
Tax Benefit (Expense)	0	0	0	0
Other comprehensive income (loss), Net-of-Tax Amount:
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	(1,749)	(400)	(1,543)	(1,283)
Accumulated Other Comprehensive Loss
Other comprehensive income (loss), Before-Tax Amount:
Before-Tax Amount	(47,810)	(68,660)	(14,863)	(101,901)
Other comprehensive income (loss), Tax Benefit (Expense):
Tax Benefit (Expense)	5,915	9,077	5,438	21,965
Other comprehensive income (loss), Net-of-Tax Amount:
TOTAL OTHER COMPREHENSIVE LOSS, NET OF TAX	$ (41,895)	$ (59,583)	$ (9,425)	$ (79,936)