Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 9,567		$ 11,147
Other comprehensive income/(loss):
Unrealized gain on effective cash flow hedges, net of taxes $453 and $1,608	1,806		5,402
Foreign currency translation adjustment	302		4,828
Retirement benefits, net of taxes $6 and $(2), respectively	151		(40)
Reclassification adjustments
Realized loss on cash flow hedges, net of taxes $126 and $496	183	[1]	1,758	[1]
Retirement benefits, net of taxes $3 and $8	52	[2]	29	[2]
Total other comprehensive income	2,494		11,977
Total comprehensive income	$ 12,061		$ 23,124

[1] These are reclassified to net income and are included in the foreign exchange gain/(loss) in the unaudited consolidated statements of income. See Note 7 to the unaudited consolidated financial statements.

[2] These are reclassified to net income and are included in the computation of net periodic pension costs in the unaudited consolidated statements of income. See Note 10 to the unaudited consolidated financial statements.