CONSOLIDATED STATEMENTS OF OPERATIONS & COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 24, 2016	Jun. 26, 2015	Jun. 24, 2016	Jun. 26, 2015
Revenue from services	$ 672,612	$ 627,714	$ 1,318,592	$ 1,201,029
Cost of services	502,688	475,748	998,156	919,227
Gross profit	169,924	151,966	320,436	281,802
Selling, general and administrative expenses	135,787	117,859	266,411	229,452
Depreciation and amortization	11,694	10,397	22,983	20,917
Goodwill and intangible asset impairment charge	99,269	0	99,269	0
Income (loss) from operations	(76,826)	23,710	(68,227)	31,433
Interest expense	(1,740)	(881)	(3,709)	(2,047)
Interest and other income	853	679	1,803	1,311
Interest and other expense, net	(887)	(202)	(1,906)	(736)
Income (loss) before tax expense	(77,713)	23,508	(70,133)	30,697
Income tax expense (benefit)	(13,978)	6,235	(13,366)	7,708
Net income (loss)	$ (63,735)	$ 17,273	$ (56,767)	$ 22,989
Net income (loss) per common share:
Basic (in dollars per share)	$ (1.53)	$ 0.42	$ (1.36)	$ 0.56
Diluted (in dollars per share)	$ (1.53)	$ 0.42	$ (1.36)	$ 0.55
Weighted average shares outstanding:
Basic (in shares)	41,688	41,240	41,595	41,135
Diluted (in shares)	41,688	41,475	41,595	41,472
Other comprehensive income (loss):
Total other comprehensive income (loss), net of tax	$ (221)	$ 974	$ 2,256	$ (271)
Comprehensive income (loss)	(63,956)	18,247	(54,511)	22,718
Foreign currency translation adjustment
Other comprehensive income (loss):
Foreign currency translation adjustment, net of tax	(307)	587	2,094	(825)
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Other comprehensive income (loss):
Unrealized gain on investments, net of tax	$ 86	$ 387	$ 162	$ 554