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CONSOLIDATED STATEMENTS OF INCOME (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Revenue $ 298,189 $ 257,552 $ 169,743
Cost of sales (73,693) (65,083) (45,355)
Gross profit 224,496 192,469 124,388
Selling, general, and administrative expenses (197,114) (160,829) (105,891)
Income from operations 27,382 31,640 18,497
Other income (expense):      
Interest expense (102) (111) (145)
Interest and dividend income 421 385 155
Other (21) (222) (83)
Nonoperating Income (Expense), Total 298 52 (73)
Income before income taxes 27,680 31,692 18,424
Provision for income taxes (9,139) (12,081) (7,067)
Net income $ 18,541 $ 19,611 $ 11,357
Basic earnings per share $ 1.33 $ 1.39 $ 0.84
Diluted earnings per share $ 1.31 $ 1.35 $ 0.77
Weighted average shares outstanding -      
Basic 13,965,018 14,082,213 13,515,318
Diluted 14,198,495 14,572,921 14,736,639