Shareholders' Equity Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	$ (176)	$ (255)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(200,607)
Total other comprehensive income (loss), net of tax	7,182	(59,929)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	318	(504)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(193,425)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(200,607)	(135,060)
OCI before reclassifications	7,245	(60,689)
Amounts reclassified from AOCI	(63)	760
Total other comprehensive income (loss), net of tax	7,182	(59,929)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(193,425)	(194,989)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(158,009)	(85,080)
OCI before reclassifications	10,106	(60,319)
Amounts reclassified from AOCI	0	0
Total other comprehensive income (loss), net of tax	10,106	(60,319)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(147,903)	(145,399)
Accumulated Other Comprehensive Income, Net Unrealized Gain (Loss) on Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	318	(768)
OCI before reclassifications	(2,782)	(369)
Amounts reclassified from AOCI	176	255
Total other comprehensive income (loss), net of tax	(2,606)	(114)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(2,288)	(882)
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)
OCI before reclassifications	0	0
Amounts reclassified from AOCI	0	0
Total other comprehensive income (loss), net of tax	0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(14,380)	(14,380)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(28,536)	(34,832)
OCI before reclassifications	(79)	(1)
Amounts reclassified from AOCI	(239)	505
Total other comprehensive income (loss), net of tax	(318)	504
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (28,854)	$ (34,328)