Goodwill and Other Intangible Assets Narrative (Details) (USD $)	12 Months Ended										12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Developed Technology [Member]	Dec. 31, 2011 Developed Technology [Member]	Dec. 31, 2012 Noncompete Agreements [Member]	Dec. 31, 2011 Noncompete Agreements [Member]	Dec. 31, 2012 Trademarks [Member]	Dec. 31, 2011 Trademarks [Member]	Dec. 31, 2010 Trademarks [Member]	Dec. 31, 2012 Client Relationships [Member]	Dec. 31, 2011 Client Relationships [Member]	Dec. 31, 2012 DSPCon, Inc [Member]	Dec. 31, 2011 DSPCon, Inc [Member]	Dec. 20, 2010 DSPCon, Inc [Member]	Dec. 20, 2010 DSPCon, Inc [Member] Developed Technology [Member]	Dec. 20, 2010 DSPCon, Inc [Member] Trademarks [Member]	Dec. 20, 2010 DSPCon, Inc [Member] Client Relationships [Member]	Jun. 28, 2010 L.R. Kimball [Member]	Jun. 28, 2010 L.R. Kimball [Member] Noncompete Agreements [Member]	Jun. 28, 2010 L.R. Kimball [Member] Trademarks [Member]	Jun. 28, 2010 L.R. Kimball [Member] Client Relationships [Member]	Jul. 02, 2012 PSS [Member]	Sep. 30, 2012 GETS [Member]	Jul. 02, 2012 Trademarks [Member] GETS [Member]
Finite-Lived Intangible Assets [Line Items]
Business Combination, Consideration Transferred															$ 6,900,000				$ 34,100,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net															5,600,000	500,000	100,000	1,700,000	23,100,000	200,000	5,100,000	2,200,000
Goodwill	62,009,000	61,527,000												3,400,000					15,600,000				10,800,000
Contingent payment amount													400,000
Fair value of contingent consideration													2,000,000
Fair value in excess of carrying value, as a percentage																							6.00%		5.00%
Indefinite-lived trademarks								2,165,000	7,265,000	7,265,000														5,100,000
Amortization expense related to intangible assets	$ 1,306,000	$ 1,368,000	$ 700,000	$ 92,000	$ 92,000	$ 29,000	$ 31,000	$ 34,000	$ 33,000		$ 1,056,000	$ 1,148,000