Factoring of Accounts Receivable (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010
Factoring of Accounts Receivable [Abstract]
Accounts receivable sold without recourse	$ 0.1	$ 10.3

The value of receivables sold at a discount to unrelated third party financiers without recourse.

No definition available.

Name:	feic_AccountsReceivableSoldWithoutRecourse
Namespace Prefix:	feic_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration