Business Combinations, Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Estimated fair value of contingent consideration liability	$ 0	$ 1,606,000
TriTek [Member]
Business Acquisition [Line Items]
Date of acquisition	May 01, 2013
Cash paid for acquisition	17,000,000
Common stock issued	4,100,000
Transaction costs	800,000
Payments to acquire businesses, gross	17,000,000
Clear Task [Member]
Business Acquisition [Line Items]
Date of acquisition	May 17, 2013
Cash paid for acquisition	6,000,000
Common stock issued	1,200,000
Estimated fair value of contingent consideration liability	3,600,000
Estimated fair value of earn-out	1,400,000
Percentage of earnings based contingent consideration paid in cash upon achievement of contingency (in hundredths)	80.00%
Percentage of earnings based contingent consideration issued in stock upon achievement of contingency (in hundredths)	20.00%
Transaction costs	600,000
Payments to acquire businesses, gross	6,000,000
CoreMatrix [Member]
Business Acquisition [Line Items]
Date of acquisition	Oct. 11, 2013
Cash paid for acquisition	18,600,000
Common stock issued	2,500,000
Estimated fair value of earn-out	3,400,000
Transaction costs	800,000
Payments to acquire businesses, gross	18,600,000
ForwardThink [Member]
Business Acquisition [Line Items]
Date of acquisition	Feb. 10, 2014
Cash paid for acquisition	26,900,000
Common stock issued	13,200,000
Transaction costs	1,300,000
Payments to acquire businesses, gross	26,900,000
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized - Cash Incentive Plan	800,000
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Period of Recognition Incentive Plan	3 years
BioPharm [Member]
Business Acquisition [Line Items]
Date of acquisition	Apr. 01, 2014
Cash paid for acquisition	11,200,000
Common stock issued	5,100,000
Transaction costs	700,000
Payments to acquire businesses, gross	11,200,000
Trifecta [Member]
Business Acquisition [Line Items]
Date of acquisition	May 07, 2014
Cash paid for acquisition	8,200,000
Common stock issued	0
Transaction costs	600,000
Payments to acquire businesses, gross	8,200,000
Cost Of Acquired Entity Purchase Price	$ 13,600,000
12 Month Earn-Out [Member] | CoreMatrix [Member]
Business Acquisition [Line Items]
Percentage of earnings based contingent consideration paid in cash upon achievement of contingency (in hundredths)	60.00%
Percentage of earnings based contingent consideration issued in stock upon achievement of contingency (in hundredths)	40.00%
24 Month Earn-Out [Member] | CoreMatrix [Member]
Business Acquisition [Line Items]
Percentage of earnings based contingent consideration paid in cash upon achievement of contingency (in hundredths)	80.00%
Percentage of earnings based contingent consideration issued in stock upon achievement of contingency (in hundredths)	20.00%
Minimum [Member] | TriTek [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	8 months
Minimum [Member] | Clear Task [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	5 months
Minimum [Member] | CoreMatrix [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	6 months
Minimum [Member] | ForwardThink [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	11 months
Minimum [Member] | BioPharm [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	9 months
Minimum [Member] | Trifecta [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	8 months
Maximum [Member] | TriTek [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	8 years
Maximum [Member] | Clear Task [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	5 years
Maximum [Member] | CoreMatrix [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	10 years
Maximum [Member] | ForwardThink [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	6 years
Maximum [Member] | BioPharm [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	10 years
Maximum [Member] | Trifecta [Member]
Business Acquisition [Line Items]
Intangible assets estimated useful life	5 years