Shareholders Equity Components of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax		$ (266,327)	$ (104,931)	$ (348,241)
Accumulated other comprehensive loss		(299,449)	(124,883)	(383,539)
Foreign Currency Translation Adjustment and Other		(163,927)	248,317	(108,872)
Unrealized Gain (loss) on Investment Securities, Net		0	8,852	(2,439)
Unrealized Gain (Loss) on Interest Rate Swaps Designated as Cash Flow Hedges, Net		931	(2,359)	373
Employee Benefit Plan Items, Net		8,253	8,853	10,148
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent		(174,566)	258,656
Other comprehensive income (loss)		(154,743)	263,663	(100,790)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent		(161,396)	243,310
Unrealized gain loss on investment securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		0	14,946	6,094
Unrealized Gain (loss) on Investment Securities, Net		(14,946)	8,852
Unrealized gain loss on interest rate swaps designated as cash flow hedges, net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		(5,560)	(5,306)	(2,947)
Unrealized Gain (Loss) on Interest Rate Swaps Designated as Cash Flow Hedges, Net		(254)	(2,359)
Employee benefit plan items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		(27,562)	(29,592)	$ (38,445)
Employee Benefit Plan Items, Net		2,030	8,853
Other comprehensive income before reclassifications [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign Currency Translation Adjustment and Other	[1]	(161,359)	253,066
Unrealized Gain (loss) on Investment Securities, Net		0	8,852
Unrealized Gain (Loss) on Interest Rate Swaps Designated as Cash Flow Hedges, Net		0	(2,870)
Employee Benefit Plan Items, Net		4,939	(3,812)
Other comprehensive income (loss)		(156,420)	255,236
Reclassification out of Accumulated Other Comprehensive Income [Domain]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign Currency Translation Adjustment and Other		(37)	(9,756)
Unrealized Gain (loss) on Investment Securities, Net		0	0
Unrealized Gain (Loss) on Interest Rate Swaps Designated as Cash Flow Hedges, Net		931	511
Employee Benefit Plan Items, Net		3,314	12,665
Other comprehensive income (loss)		4,208	3,420
Cumulative impact of newly adopted accounting standard updates [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign Currency Translation Adjustment and Other	[2]	0
Unrealized Gain (loss) on Investment Securities, Net	[2]	(14,946)
Unrealized Gain (Loss) on Interest Rate Swaps Designated as Cash Flow Hedges, Net	[2]	(1,185)
Employee Benefit Plan Items, Net	[2]	(6,223)
Other comprehensive income (loss)	[2]	(22,354)
Intra-entity foreign currency transactions [Member] | Other comprehensive income before reclassifications [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign Currency Translation Adjustment and Other		$ 11,712	$ (64,610)

[1] Foreign currency translation adjustment includes intra-entity foreign currency transactions that are of a long-term investment nature of $11,712 and $(64,610) for 2018 and 2017, respectively.

[2] Amount relates to unrealized gains and losses on investments and stranded tax effects reclassified from "Accumulated other comprehensive income" to "Retained earnings" in accordance with ASU No. 2018-02 and ASU No. 2016-01 (Note 1).