Reporting Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014 Reportable_Segment		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Number of reportable segments (in segments)																	3
Term for Master Statement of Work																					3 years
Revenue	$ 266,686		$ 295,732		$ 284,282		$ 276,272		$ 277,114		$ 277,916		$ 263,363		$ 269,466		$ 1,122,972		$ 1,087,859		$ 1,104,958
Gross profit	48,509		54,488		52,797		50,763		52,248		52,697		51,545		50,151		206,557		206,641		219,409
Operating profit (loss)	(14,769)	[1]	8,482	[1]	6,988	[1]	4,685	[1]	3,815	[2],[3]	6,946	[2],[3]	5,242	[2],[3]	4,913	[2],[3]	5,386	[4],[5]	20,916	[2],[3],[4],[5]	32,266	[4],[5]
Other (expense) income, net																	(228)		(268)		(251)
Income before income taxes																	5,158		20,648		32,015
Restructuring Charges	3,573		0		(298)		370		5,716		0		0		0		3,645		5,716		0
GETS [Member]
Segment Reporting Information [Line Items]
Revenue																	335,382		321,289		325,046
Gross profit																	90,104		89,801		93,718
Operating profit (loss)																	(8,256)		11,398		12,714
Restructuring Charges																	2,244		2,412		0
PSS [Member]
Segment Reporting Information [Line Items]
Revenue																	728,686		708,598		710,268
Gross profit																	88,738		89,546		94,185
Operating profit (loss)																	24,594		21,032		27,062
Restructuring Charges																	1,001		2,269		0
MRI [Member]
Segment Reporting Information [Line Items]
Revenue																	58,904		57,972		69,644
Gross profit																	27,715		27,294		31,506
Operating profit (loss)																	6,531		7,603		9,874
Restructuring Charges																	259		313		0
Corporate [Member]
Segment Reporting Information [Line Items]
Operating profit (loss)																	(17,483)		(19,117)		(17,384)
Restructuring Charges																	$ 141		$ 722		$ 0
Sales [Member] | IBM [Member]
Segment Reporting Information [Line Items]
Concentration risk percentage																	15.00%		19.00%		20.00%

[1] In In the first quarter of 2014, the Company recorded an aggregate $0.9 million charge to net income related to the separation of the Company's former CEO comprised of a $0.7 million pre-tax charge ($0.4 million after tax) to operations and an additional $0.5 million charge to income tax expense for the write-off of certain deferred tax assets related to the forfeiture of outstanding equity awards.

[2] In 2013, the Company's GETS segment recorded a $1.8 million benefit to "Operating and administrative expenses" related to the reduction of an acquisition earnout liability (by quarter: first $0.3 million, second $0.4 million, third $0.5 million and fourth $0.6 million.)

[3] In the fourth quarter of 2013, the Company recorded a $3.3 million benefit to "Operating and administrative expenses" related to the settlement of legal claims pursued by the Company.

[4] In 2014 and 2013, the Company recorded pre-tax charges of $3.6 million and $5.7 million, respectively, to "Restructuring and other related costs" related to the 2014 and 2013 Restructuring Plans. The following table summarizes the amount of restructuring and other related costs recognized by reporting segment for the indicated periods: Year ended December 31, 2014 2013 2012 GETS $2,244 $2,412 $—PSS 1,001 2,269 —MRI 259 313 —Corporate 141 722 —Restructuring and other related costs $3,645 $5,716 $—

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