Accumulated Other Comprehensive Loss (Components of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ (463,957)	$ (205,217)	$ (379,141)	$ (220,295)
Other comprehensive (loss) income before reclassifications	(53,284)	(98,289)	(147,970)	(90,370)
Amounts reclassified from AOCL	4,016	2,575	13,886	9,734
Net current-period other comprehensive (loss) income	(49,268)	(95,714)	(134,084)	(80,636)
Ending balance	(513,225)	(300,931)	(513,225)	(300,931)
Accumulated Other Comprehensive Income (Loss), accumulated Net Gain (Loss) from Net investment hedge	700		9,300
Interest Rate Cash Flow Hedge Gain (Loss) to be Reclassified During Next 12 Months, Net	3,700		3,700
Foreign currency translation items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(331,301)	(79,220)	(238,533)	(89,953)
Other comprehensive (loss) income before reclassifications	(54,494)	(100,195)	(147,262)	(91,239)
Amounts reclassified from AOCL	0	0	0	1,777
Net current-period other comprehensive (loss) income	(54,494)	(100,195)	(147,262)	(89,462)
Ending balance	(385,795)	(179,415)	(385,795)	(179,415)
Pension and other post-retirement effects
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(125,727)	(125,286)	(135,398)	(129,528)
Other comprehensive (loss) income before reclassifications	1,245	4,710	6,031	3,816
Amounts reclassified from AOCL	2,443	2,568	7,328	7,704
Net current-period other comprehensive (loss) income	3,688	7,278	13,359	11,520
Ending balance	(122,039)	(118,008)	(122,039)	(118,008)
Cash flow hedging activity
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(6,929)	(711)	(5,210)	(814)
Other comprehensive (loss) income before reclassifications	(35)	(2,804)	(6,739)	(2,947)
Amounts reclassified from AOCL	1,573	7	6,558	253
Net current-period other comprehensive (loss) income	1,538	(2,797)	(181)	(2,694)
Ending balance	(5,391)	(3,508)	(5,391)	(3,508)
Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ 2,700	$ 1,300	$ 2,700	$ 1,300	$ 1,400	$ 1,300	$ 1,300	$ 1,200