Shareholders' Equity Shareholders Equity Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (348,556)	$ (241,326)	$ (16,605)
Accumulated Other Comprehensive Income (Loss), Net of Tax	(383,854)	(284,706)	(64,617)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(109,187)	(223,268)	(265,030)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(2,439)	814	(12,925)
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net of Tax	373	871	403
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	10,148	2,947	(12,617)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(99,148)	(220,089)
Other comprehensive income	(101,105)	(218,636)	(290,169)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(107,230)	(224,721)
Unrealized gain loss on investment securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	6,094	8,533	7,719
Unrealized gain loss on interest rate swaps designated as cash flow hedges, net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2,947)	(3,320)	(4,191)
Employee benefit plan items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(38,445)	(48,593)	$ (51,540)
Other comprehensive income before reclassifications [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(103,254)	(221,791)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	(2,439)	814
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net of Tax	0	550
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	204	15
Other comprehensive income	(105,489)	(220,412)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(3,976)	(2,930)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	0	0
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net of Tax	373	321
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	9,944	2,932
Other comprehensive income	6,341	323
Intra-entity foreign currency transactions [Member] | Other comprehensive income before reclassifications [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	$ (12,852)	$ 30,960