Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified											12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Quoted Prices in Active Markets for Identical Assets (Level 1)	Dec. 31, 2012 Quoted Prices in Active Markets for Identical Assets (Level 1)	Dec. 31, 2013 Significant Other Observable Inputs (Level 2)	Dec. 31, 2012 Significant Other Observable Inputs (Level 2)	Dec. 31, 2013 Significant Unobservable Inputs (Level 3)	Dec. 31, 2012 Significant Unobservable Inputs (Level 3)	Dec. 31, 2013 Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2012 Estimate of Fair Value, Fair Value Disclosure [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Maturity of Bank Acceptances											3 months	6 months
Derivative Assets			$ 0	$ 0	$ 543	$ 3,315	$ 0	$ 0	$ 543	$ 3,315
Derivative Liabilities	(755)	(1,970)	0	0	(755)	(1,970)	0	0	(755)	(1,970)
Bank acceptances			0	0	6,461	3,441	0	0	6,461	3,441
Rabbi Trust Asset Fair Value Disclosure			1,975	1,831	0	0	0	0	1,975	1,831
Financial Instruments Asset Liabilities at Fair Value Net			$ 1,975	$ 1,831	$ 6,249	$ 4,786	$ 0	$ 0	$ 8,224	$ 6,617