Quarterly Financial Data (Unaudited) - (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended									12 Months Ended
	Dec. 31, 2014		Sep. 26, 2014	Jun. 27, 2014	Mar. 28, 2014	Dec. 31, 2013	Sep. 27, 2013	Jun. 28, 2013	Mar. 29, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenue	$ 98,266		$ 96,760	$ 100,331	$ 97,911	$ 102,735	$ 100,689	$ 107,117	$ 108,495	$ 393,268	$ 419,036
Direct costs	80,095	[1]	77,723	79,133	76,979	80,455	79,506	84,470	85,896	313,930	330,327	333,086
Gross profit	18,171		19,037	21,198	20,932	22,280	21,183	22,647	22,599	79,338	88,709
Selling, general, and administrative expenses	16,535	[2]	14,466	15,728	15,457	16,188	15,129	16,248	16,417	62,186	63,982	66,867
Operating income	1,636		4,571	5,470	5,475	6,092	6,054	6,399	6,182	17,152	24,727	24,462
Interest and other expense, net	(29)		(33)	(55)	(97)	(82)	(91)	(106)	(109)	(214)	(388)
Income before income taxes	1,607		4,538	5,415	5,378	6,010	5,963	6,293	6,073	16,938	24,339	25,445
Provision for income taxes	382		1,812	2,182	2,212	2,306	2,100	2,238	2,016	6,588	8,660	9,280
Net Income	1,225		2,726	3,233	3,166	3,704	3,863	4,055	4,057	10,350	15,679	16,165
Basic (in dollars per share)	$ 0.08		$ 0.18	$ 0.22	$ 0.21	$ 0.24	$ 0.25	$ 0.26	$ 0.26	$ 0.68	$ 1.02	$ 1.07
Diluted (in dollars per share)	$ 0.08		$ 0.17	$ 0.20	$ 0.19	$ 0.22	$ 0.23	$ 0.24	$ 0.24	$ 0.64	$ 0.92	$ 0.96
Cash dividend declared per share	$ 0.06		$ 0.06	$ 0.06	$ 0.06	$ 0.05	$ 0.05	$ 0.05	$ 0.05	$ 0.24	$ 0.20	$ 0.00
Asset impairment charges	1,544
Asset Impairment Charges Net	944
Asset Impairment Charges Per Share Basic	$ 0.06
Asset Impairment Charges Per Share Diluted	$ 0.06
Unusual or Infrequent Item, Loss, Gross	1,980
Unusual or Infrequent Item, Net (Gain) Loss	$ 1,210
Unusual or Infrequent Item Per Basic Share	$ 0.08
Unusual or Infrequent Item Per Diluted Share	$ 0.07

[1] Included in fourth quarter direct costs is approximately $1.5 million, or $0.9 million, net of tax, or $0.06 basic and diluted net income per share, relating to the disposal of one of the Company's capitalized software projects.

[2] Included in fourth quarter selling, general, and administrative expenses is approximately $2.0 million, or $1.2 million, net of tax, or $0.08 basic and $0.07 diluted net income per share, of costs relating to the death of the Company's Chairman and Chief Executive Officer under his employment agreement.