Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Comprehensive Income (unaudited) [Abstract]
Net income	$ 9,928	$ 4,757	$ 16,966	$ 7,466
Other comprehensive (loss)/income:
Foreign currency translation adjustments	(8,930)	1,445	(2,957)	12,819
Foreign currency forward contracts, net of tax of $12, $7, $85 and $39 at respective dates	(34)	(52)	(199)	(118)
Interest rate swap agreements	(440)	0	(820)	0
Pension plan amortization of net actuarial loss and prior service cost, net of tax of $12, $7, $25 and $14 at respective dates	299	269	598	543
Comprehensive income	$ 823	$ 6,419	$ 13,588	$ 20,710