Other Comprehensive Income Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			$ (34,384)
Total other comprehensive income (loss), net of tax	8,203	(53,198)	(23,545)	(24,634)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(57,929)		(57,929)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			(34,384)	(37,160)
OCI before reclassifications			(23,914)	(24,679)
Amounts reclassified from AOCI			369	45
Total other comprehensive income (loss), net of tax			(23,545)	(24,634)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(57,929)	(61,794)	(57,929)	(61,794)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period			(3,313)	(24,718)
OCI before reclassifications			(24,120)	(23,830)
Amounts reclassified from AOCI			0	0
Total other comprehensive income (loss), net of tax			(24,120)	(23,830)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(27,433)	(48,548)	(27,433)	(48,548)
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			(1,689)	0
OCI before reclassifications			772	(849)
Amounts reclassified from AOCI			0	0
Total other comprehensive income (loss), net of tax			772	(849)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(917)	(849)	(917)	(849)
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			(15,002)	1,938
OCI before reclassifications			(566)	0
Amounts reclassified from AOCI			369	45
Total other comprehensive income (loss), net of tax			(197)	45
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (15,199)	$ 1,983	$ (15,199)	$ 1,983