Derivative Instruments (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2014 EUR (€)	Jun. 30, 2014 GBP (£)	Jun. 30, 2014 JPY (¥)	Dec. 31, 2013 USD ($)	Dec. 31, 2013 EUR (€)	Dec. 31, 2013 GBP (£)	Dec. 31, 2013 JPY (¥)	Jun. 30, 2014 Foreign Exchange Contract [Member] Not designated as Hedges [Member] USD ($)	Dec. 31, 2013 Foreign Exchange Contract [Member] Not designated as Hedges [Member] USD ($)	Jun. 30, 2014 Foreign Exchange Contract [Member] Not designated as Hedges [Member] Prepaid expenses and other current assets [Member] USD ($)	Dec. 31, 2013 Foreign Exchange Contract [Member] Not designated as Hedges [Member] Prepaid expenses and other current assets [Member] USD ($)	Jun. 30, 2014 Foreign Exchange Contract [Member] Not designated as Hedges [Member] Other assets [Member] USD ($)	Dec. 31, 2013 Foreign Exchange Contract [Member] Not designated as Hedges [Member] Other assets [Member] USD ($)	Jun. 30, 2014 Foreign Exchange Contract [Member] Not designated as Hedges [Member] Other current liabilities [Member] USD ($)	Dec. 31, 2013 Foreign Exchange Contract [Member] Not designated as Hedges [Member] Other current liabilities [Member] USD ($)	Jun. 30, 2014 Foreign Exchange Contract [Member] Not designated as Hedges [Member] Other liabilities [Member] USD ($)	Dec. 31, 2013 Foreign Exchange Contract [Member] Not designated as Hedges [Member] Other liabilities [Member] USD ($)
Notional Disclosures [Abstract]
Derivative, Maturity Date				May 01, 2016
Foreign exchange contract outstanding					€ 1,300,000	£ 100,000	¥ 0		€ 13,300,000	£ 200,000	¥ 10,100,000
Estimated fair value of the contracts in the consolidated balance sheets [Abstract]
Asset derivatives	3,000		3,000					142,000						3,000	140,000	0	2,000
Liability derivatives	48,000		48,000					655,000										37,000	637,000	11,000	18,000
Net fair value												(45,000)	(513,000)
Gain (loss) from derivative instruments [Abstract]
Foreign exchange contracts- change in fair value	11,000	(548,000)	254,000	1,000
Remeasurement of related contract receivables, billings in excess of revenue earned, and subcontractor accruals	(6,000)	138,000	(145,000)	(144,000)
Gain (loss) on derivative instruments, net	$ 5,000	$ (410,000)	$ 109,000	$ (143,000)