Shareholders' Equity Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			$ (200,607)
Total other comprehensive income (loss), net of tax	$ 8,528	$ (13,304)	5,913	$ (58,860)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	1,198	(866)	1,807	(1,863)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(194,694)		(194,694)
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			7,895	(62,447)
Amounts reclassified from AOCI			(1,982)	3,587
Total other comprehensive income (loss), net of tax			5,913	(58,860)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(194,694)	(193,920)	(194,694)	(193,920)
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			12,317	(61,765)
Amounts reclassified from AOCI			(1,407)	962
Total other comprehensive income (loss), net of tax			10,910	(60,803)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(147,099)	(145,883)	(147,099)	(145,883)
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			(3,709)	(681)
Amounts reclassified from AOCI			519	761
Total other comprehensive income (loss), net of tax			(3,190)	80
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(2,872)	(688)	(2,872)	(688)
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)	(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			(713)	(1)
Amounts reclassified from AOCI			(1,094)	1,864
Total other comprehensive income (loss), net of tax			(1,807)	1,863
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (30,343)	$ (32,969)	$ (30,343)	$ (32,969)