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Condensed Consolidated Statements of Income - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 6 Months Ended
Jul. 01, 2016
Jul. 03, 2015
Jul. 01, 2016
Jul. 03, 2015
Revenues:        
Revenues before reimbursements $ 73,334 $ 75,272 $ 152,284 $ 151,413
Reimbursements 3,961 4,592 8,167 8,744
Revenues 77,295 79,864 160,451 160,157
Operating expenses:        
Compensation and related expenses 47,040 45,777 99,057 96,892
Other operating expenses 7,218 6,703 14,201 13,213
Reimbursable expenses 3,961 4,592 8,167 8,744
General and administrative expenses 4,145 4,087 7,659 7,575
Total operating expenses 62,364 61,159 129,084 126,424
Operating income 14,931 18,705 31,367 33,733
Other income, net:        
Interest income, net 171 34 310 68
Miscellaneous income, net 1,575 553 2,734 2,562
Total other income, net 1,746 587 3,044 2,630
Income before income taxes 16,677 19,292 34,411 36,363
Income taxes 6,224 7,595 8,608 14,333
Net income $ 10,453 $ 11,697 $ 25,803 $ 22,030
Net income per share:        
Basic $ 0.39 $ 0.44 $ 0.97 $ 0.83
Diluted $ 0.38 $ 0.43 $ 0.95 $ 0.8
Shares used in per share computations:        
Basic 26,631 26,714 26,572 26,668
Diluted 27,264 27,368 27,256 27,386
Cash dividends declared per common share $ 0.18 $ 0.15 $ 0.36 $ 0.3