Shareholders' Equity 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), Net of Tax, Beginning of Period	$ (135,060)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(65,547)	$ (113,756)	$ 13,489
Accumulated Other Comprehensive Income (Loss), Net of Tax	(200,607)	(135,060)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(135,060)	(21,304)	(34,793)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(69,245)	(115,565)	11,679
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	3,698	1,809	1,810
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(65,547)	(113,756)	13,489
Accumulated Other Comprehensive Income (Loss), Net of Tax	(200,607)	(135,060)	(21,304)
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Nonderivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(14,380)	(14,380)	(14,380)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax	(14,380)	(14,380)	(14,380)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(768)	(1,256)	(1,689)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	76	(566)	2
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1,010	1,054	431
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,086	488	433
Accumulated Other Comprehensive Income (Loss), Net of Tax	318	(768)	(1,256)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(85,080)	4,217	(3,722)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(73,891)	(89,297)	7,939
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	962	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	(72,929)	(89,297)	7,939
Accumulated Other Comprehensive Income (Loss), Net of Tax	(158,009)	(85,080)	4,217
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(34,832)	(9,885)	(15,002)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	4,570	(25,702)	3,738
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1,726	755	1,379
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	6,296	(24,947)	5,117
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (28,536)	$ (34,832)	$ (9,885)