Investment In Partnerships (Condensed Balance Sheet Of Joint Venture) (Details) (Global Coils [Member], USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Global Coils [Member]
Schedule of Equity Method Investments [Line Items]
Current assets	$ 2,152	$ 1,594
Non-current assets	84	124
Total assets	2,236	1,718
Current liabilities	1,205	737
Stockholders' equity	1,031	981
Total liabilities and stockholders' equity	$ 2,236	$ 1,718