Shareholders' Equity Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	$ (34,384)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	12,662	2,776	(2,186)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(21,722)	(34,384)
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(34,384)	(37,160)	(34,974)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	13,610	2,944	(2,169)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(948)	(168)	(17)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	12,662	2,776	(2,186)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(21,722)	(34,384)	(37,160)
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)	(5,514)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	0	0	(8,866)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	0	(8,866)
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(14,380)	(14,380)	(14,380)
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning of Period	(1,689)	0	(4,520)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	2	(1,689)	4,520
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	431	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	433	(1,689)	4,520
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	(1,256)	(1,689)	0
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)	(26,026)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	7,112	21,405	1,308
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	7,112	21,405	1,308
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	3,799	(3,313)	(24,718)
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	1,086
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	6,496	(16,772)	869
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(1,379)	(168)	(17)
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	5,117	(16,940)	852
Accumulated Other Comprehensive Income (Loss), Net of Tax, End of Period	$ (9,885)	$ (15,002)	$ 1,938