Shareholders' Equity Shareholders Equity Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (241,326)	$ (16,605)	$ 248,425
Accumulated Other Comprehensive Income (Loss), Net of Tax	(284,706)	(64,617)	225,552
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(223,268)	(265,030)	65,793
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	814	(12,925)	1,027
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net of Tax	871	403	2,075
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	2,947	(12,617)	11,520
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(220,089)
Other comprehensive income	(218,636)	(290,169)	80,415
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent	(224,721)
Unrealized gain loss on investment securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	8,533	7,719	20,644
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	(3,320)	(4,191)	(4,594)
Employee benefit plan items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(48,593)	(51,540)	$ (38,923)
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	(221,791)	(265,432)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	814	5,344
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net of Tax	550	0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	15	(14,630)
Other comprehensive income	(220,412)	(274,718)
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	(2,930)	402
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	0	(18,269)
Other Comprehensive Income (Loss), Unrealized Gain on Derivatives Arising During Period, Net of Tax	321	403
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	2,932	2,013
Other comprehensive income	323	(15,451)
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	$ 30,960	$ 57,109