Accumulated Other Comprehensive (Loss)/Income (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive (Loss)/Income
Accumulated other comprehensive (loss)/income, beginning balance			$ 6,089,000	$ 47,271,000
Other comprehensive (loss)/income before reclassifications			(36,836,000)	(22,198,000)
Amounts reclassified from accumulated other comprehensive income, net of tax			(974,000)	(1,928,000)
Current period change	(42,703,000)	12,136,000	(37,810,000)	(24,126,000)
Accumulated other comprehensive (loss)/income, ending balance	(31,721,000)	23,145,000	(31,721,000)	23,145,000
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive (Loss)/Income
Accumulated other comprehensive (loss)/income, beginning balance			(14,687,000)	47,845,000
Other comprehensive (loss)/income before reclassifications			(23,262,000)	(40,876,000)
Amounts reclassified from accumulated other comprehensive income, net of tax			0	0
Current period change			(23,262,000)	(40,876,000)
Accumulated other comprehensive (loss)/income, ending balance	(37,949,000)	6,969,000	(37,949,000)	6,969,000
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive (Loss)/Income
Accumulated other comprehensive (loss)/income, beginning balance			214,000	(148,000)
Other comprehensive (loss)/income before reclassifications			325,000	295,000
Amounts reclassified from accumulated other comprehensive income, net of tax			0	0
Current period change			325,000	295,000
Accumulated other comprehensive (loss)/income, ending balance	539,000	147,000	539,000	147,000
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive (Loss)/Income
Accumulated other comprehensive (loss)/income, beginning balance			20,562,000	(426,000)
Other comprehensive (loss)/income before reclassifications			(13,899,000)	18,383,000
Amounts reclassified from accumulated other comprehensive income, net of tax			(974,000)	(1,928,000)
Current period change			(14,873,000)	16,455,000
Accumulated other comprehensive (loss)/income, ending balance	5,689,000	16,029,000	5,689,000	16,029,000
Tax benefit on amounts reclassified from AOCI			$ 649,000	$ 1,286,000