Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Operations [Abstract]
Revenues	$ 1,192,680	$ 1,123,301	$ 1,000,903
Cost of sales	569,482	515,324	464,493
Gross profit	623,198	607,977	536,410
Selling, general and administrative expenses	549,154	460,393	404,803
Asset impairment charges	10,949	1,410	528
Income from operations	63,095	146,174	131,079
Foreign currency transaction (gains) losses, net	4,678	2,500	(4,886)
Interest income	(2,432)	(1,697)	(957)
Interest expense	1,016	837	853
Other income, net	(126)	(1,014)	(621)
Income before income taxes	59,959	145,548	136,690
Income tax expense	49,539	14,205	23,902
Net income	$ 10,420	$ 131,343	$ 112,788
Net income per common share (Note 12):
Basic	$ 0.12	$ 1.46	$ 1.27
Diluted	$ 0.12	$ 1.44	$ 1.24