Disclosure about Fair Value of Financial Instruments (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012		Dec. 31, 2011
The Market approach utilized to measure fair value of financial assets and liabilities on recurring basis
Available-for-sale equity investments	$ 942	[1]	$ 980
Interest rate swap agreements	979	[2]
Foreign currency forward contract	6,916	[2]
Totals	6,879
Level 1 [Member]
The Market approach utilized to measure fair value of financial assets and liabilities on recurring basis
Available-for-sale equity investments	942	[1]
Interest rate swap agreements	0	[2]
Foreign currency forward contract	0	[2]
Totals	942
Level 2 [Member]
The Market approach utilized to measure fair value of financial assets and liabilities on recurring basis
Available-for-sale equity investments	0	[1]
Interest rate swap agreements	979	[2]
Foreign currency forward contract	6,916	[2]
Totals	5,937
Level 3 [Member]
The Market approach utilized to measure fair value of financial assets and liabilities on recurring basis
Available-for-sale equity investments	0	[1]
Interest rate swap agreements	0	[2]
Foreign currency forward contract	0	[2]
Totals	$ 0

[1] (1) Unrealized gains or losses on equity investments are recorded in accumulated other comprehensive income (loss) at each measurement date.

[2] (2) Please see Note 11 for additional information.