Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 28,351		$ 37,736
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(20,107)		(278)
Interest rate hedges – net change in deferred (loss) gain	(1,104)		470
Pension – net change in deferred actuarial gain	53		15
Other comprehensive (loss) income, net of tax	(21,158)	[1]	207	[2]
Comprehensive income	$ 7,193		$ 37,943

[1] Amounts in parentheses represent debits (deferred losses).

[2] The average cost of the repurchased shares was $81.83 and $70.34 for the three months ended March 31, 2015 and 2014, respectively.