Debt Part 1 (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Debt Instrument
Total Debt	$ 31,803	$ 32,323
Less: current portion	(3,803)	(2,042)
Long-Term Debt	28,000	30,281
Committed lines of credit	125,000
Uncommitted lines of credit	87,757
Letters of credit, Outstanding amount	2,060
Bank guarantees	501
Commitment fees on unused lines of credit	307
Indebtedness to EBITDA ratio	0.41 to 1
EBITDA to interest expense ratio	48.00 to 1
Aggregate maturities of outstanding debt including capital lease obligations
2014	4,718
2015	4,217
2016	4,078
2017	3,940
2018	13,678
Thereafter	4,549
Total minimum obligations	35,180
Less: amount representing interest	(3,377)
Total	31,803	32,323
Credit facility borrowings, Short-Term
Debt Instrument
Total Debt	1,500	0
Aggregate maturities of outstanding debt including capital lease obligations
Total	1,500	0
Bank borrowings
Debt Instrument
Total Debt	9	22
Aggregate maturities of outstanding debt including capital lease obligations
Total	9	22
Credit facility borrowings, Long-Term
Debt Instrument
Total Debt	30,000	30,000
Aggregate maturities of outstanding debt including capital lease obligations
Total	30,000	30,000
Notes payable
Debt Instrument
Total Debt	0	750
Aggregate maturities of outstanding debt including capital lease obligations
Total	0	750
Collateralized Debt
Debt Instrument
Total Debt	11	39
Aggregate maturities of outstanding debt including capital lease obligations
Total	11	39
Capital lease obligations
Debt Instrument
Total Debt	283	1,512
Aggregate maturities of outstanding debt including capital lease obligations
Total	$ 283	$ 1,512