Other Comprehensive Income Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 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	(31,748)	28,564
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(66,132)
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	(31,934)	28,541
Amounts reclassified from AOCI	186	23
Total other comprehensive income (loss), net of tax	(31,748)	28,564
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(66,132)	(8,596)
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	(31,295)	28,541
Amounts reclassified from AOCI	0	0
Total other comprehensive income (loss), net of tax	(31,295)	28,541
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(34,608)	3,823
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	(73)	0
Amounts reclassified from AOCI	0	0
Total other comprehensive income (loss), net of tax	(73)	0
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(1,762)	0
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	(15,002)	1,938
OCI before reclassifications	(566)	0
Amounts reclassified from AOCI	186	23
Total other comprehensive income (loss), net of tax	(380)	23
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (15,382)	$ 1,961