Other Comprehensive Income Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 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	(3,114)	(31,748)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(24,836)
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	(3,471)	(31,934)
Amounts reclassified from AOCI	357	186
Total other comprehensive income (loss), net of tax	(3,114)	(31,748)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(24,836)	(66,132)
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	(3,374)	(31,295)
Amounts reclassified from AOCI	0	0
Total other comprehensive income (loss), net of tax	(3,374)	(31,295)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	425	(34,608)
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	(95)	(73)
Amounts reclassified from AOCI	258	0
Total other comprehensive income (loss), net of tax	163	(73)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(1,093)	(1,762)
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	(9,885)	(15,002)
OCI before reclassifications	(2)	(566)
Amounts reclassified from AOCI	99	186
Total other comprehensive income (loss), net of tax	97	(380)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (9,788)	$ (15,382)