Debt (Details Textual) (USD $)	12 Months Ended											12 Months Ended			12 Months Ended						12 Months Ended	0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 UNITED STATES	Dec. 31, 2013 InsurancePremiumFinanced [Member] UNITED STATES	Dec. 31, 2013 Domestic Line of Credit [Member] Letter of Credit [Member] UNITED STATES	Dec. 31, 2012 Domestic Line of Credit [Member] Letter of Credit [Member] UNITED STATES	Dec. 31, 2013 Foreign Line of Credit [Member] Brazil [Member]	Dec. 31, 2013 Foreign Line of Credit [Member] India [Member]	Dec. 31, 2013 Foreign Line of Credit [Member] Letter of Credit [Member]	Dec. 31, 2012 Foreign Line of Credit [Member] Letter of Credit [Member]	Dec. 31, 2013 Pnc Bank [Member] Revolving Credit Facility [Member] UNITED STATES	Dec. 31, 2013 Pnc Bank [Member] Revolving Credit Facility [Member] UNITED STATES	Dec. 31, 2013 Pnc Bank [Member] Revolving Credit Facility [Member] UNITED STATES	Dec. 31, 2013 Pnc Bank [Member] Secured Debt [Member] UNITED STATES	Dec. 31, 2013 Pnc Bank [Member] Letter of Credit [Member] UNITED STATES	Dec. 31, 2013 Secured Debt [Member] Pnc Bank [Member] UNITED STATES	Sep. 30, 2013 Loans Payable [Member] UNITED STATES	Dec. 31, 2013 Capital Lease Obligations [Member]	Dec. 31, 2013 Secured loan, Mississippi Development Authority [Member] Secured Debt [Member] UNITED STATES	Dec. 31, 2013 London Interbank Offered Rate (LIBOR) [Member] Pnc Bank [Member] Revolving Credit Facility [Member] UNITED STATES	Jan. 07, 2014 Subsequent Event [Member] Pnc Bank [Member] Revolving Credit Facility [Member] UNITED STATES
Short-term Debt [Line Items]
Revolving line of credit maximum borrowing capacity								$ 47,800,000	$ 12,600,000				$ 34,000,000.0		$ 15,000,000.0	$ 10,000,000.00				$ 1,500,000
Debt Instrument, Term															60 months
Line of Credit Facility, Periodic Payment, Principal															250,000
Extinguishment of Debt, Amount												2,300,000
Debt Instrument, Description of Variable Rate Basis																					LIBOR
Letters of Credit Outstanding, Amount						3,200,000	3,400,000			7,900,000	8,700,000
Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate																				2.25%
Long-term Debt, Gross																		1,000,000
Line of Credit Facility, Expiration Date													Dec. 11, 2018
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage													0.375%
Repayments of Lines of Credit																						2,000,000.0
Consolidated borrowings								28,600,000	11,300,000					8,000,000			15,000,000			1,100,000
Line of Credit Facility, Remaining Borrowing Capacity								19,200,000	1,300,000				1,100,000		12,700,000.0
Capital Lease Obligations																			1,800,000
Debt Issuance Costs	200,000	0	300,000	200,000
Unamortized Debt Issuance Expense				100,000
Amortization of Debt Financing Costs Term				5 years
Other Short-term Borrowings					400,000
Debt and Capital Lease Obligations	$ 67,200,000	$ 61,400,000
Interest rate for borrowings	8.10%	8.80%