Accumulated Other Comprehensive (Loss) Income Components and Activity in Accumulated Other Comprehensive (Loss) Income Net of Deferred Income Taxes (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance		$ (362,282)	$ 106,927	$ (62,413)	$ 116,245
Other comprehensive (loss) income, before reclassifications		45,297	(7,211)	(255,228)	(16,480)
Amounts reclassified from accumulated other comprehensive (loss) income		528	(133)	1,084	(399)
Total other comprehensive income (loss), net of tax		45,825	(7,344)	(254,144)	(16,879)
Other comprehensive loss attributable to noncontrolling interests		51	61	151	278
Ending balance		(316,406)	99,644	(316,406)	99,644
Accumulated Foreign Currency Adjustment Attributable to Parent
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance		(406,735)	111,424	(52,264)	116,465
Ending balance		(350,460)	110,681	(350,460)	110,681
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive (loss) income, before reclassifications		56,224	(804)	(298,347)	(6,062)
Amounts reclassified from accumulated other comprehensive (loss) income		0	0	0	0
Total other comprehensive income (loss), net of tax		56,224	(804)	(298,347)	(6,062)
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive loss attributable to noncontrolling interests		51	61	151	278
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance		2	186	0	487
Ending balance		4	19	4	19
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive (loss) income, before reclassifications		0	0	0	0
Amounts reclassified from accumulated other comprehensive (loss) income	[1]	2	(167)	4	(468)
Total other comprehensive income (loss), net of tax		2	(167)	4	(468)
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive loss attributable to noncontrolling interests		0	0	0	0
Accumulated Net Investment Gain (Loss) Attributable to Parent
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance		65,430	0	11,384	0
Other comprehensive (loss) income, before reclassifications		(10,930)	0	43,116	0
Amounts reclassified from accumulated other comprehensive (loss) income		0	0	0	0
Total other comprehensive income (loss), net of tax		(10,930)	0	43,116	0
Other comprehensive loss attributable to noncontrolling interests		0	0	0	0
Ending balance		54,500	0	54,500	0
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance		(20,435)	(4,011)	(20,962)	0
Ending balance		(19,909)	(10,421)	(19,909)	(10,421)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive (loss) income, before reclassifications		0	(6,410)	0	(10,421)
Amounts reclassified from accumulated other comprehensive (loss) income	[2]	526	0	1,053	0
Total other comprehensive income (loss), net of tax		526	(6,410)	1,053	(10,421)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Other comprehensive loss attributable to noncontrolling interests		0	0	0	0
Other Accumulated Comprehensive Income (Loss)
Increase (Decrease) in Accumulated Other Comprehensive Income [Roll Forward]
Beginning balance		(544)	(672)	(571)	(707)
Other comprehensive (loss) income, before reclassifications		3	3	3	3
Amounts reclassified from accumulated other comprehensive (loss) income		0	34	27	69
Total other comprehensive income (loss), net of tax		3	37	30	72
Other comprehensive loss attributable to noncontrolling interests		0	0	0	0
Ending balance		$ (541)	$ (635)	$ (541)	$ (635)

[1] The pre-tax portion of amounts reclassified from accumulated other comprehensive (loss) income consists of amortization of prior service benefit, which is a component of pension and postretirement benefits cost (credit). See Note 12, “Pension Plans and Other Postretirement Benefits.”

[2] The pre-tax portion of amounts reclassified from accumulated other comprehensive (loss) income is included in interest expense.