Other Comprehensive Income Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			$ (21,722)
Total other comprehensive income (loss), net of tax	(7,996)	8,203	(11,110)	(23,545)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(32,832)		(32,832)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			(21,722)	(34,384)
OCI before reclassifications			(11,415)	(23,914)
Amounts reclassified from AOCI			305	369
Total other comprehensive income (loss), net of tax			(11,110)	(23,545)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(32,832)	(57,929)	(32,832)	(57,929)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			3,799	(3,313)
OCI before reclassifications			(11,369)	(24,120)
Amounts reclassified from AOCI			0	0
Total other comprehensive income (loss), net of tax			(11,369)	(24,120)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(7,570)	(27,433)	(7,570)	(27,433)
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			(1,256)	(1,689)
OCI before reclassifications			(478)	772
Amounts reclassified from AOCI			522	0
Total other comprehensive income (loss), net of tax			44	772
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(1,212)	(917)	(1,212)	(917)
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			(9,885)	(15,002)
OCI before reclassifications			432	(566)
Amounts reclassified from AOCI			(217)	369
Total other comprehensive income (loss), net of tax			215	(197)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (9,670)	$ (15,199)	$ (9,670)	$ (15,199)