Operating Leases (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 item sqft	Dec. 31, 2011
Operating Leased Assets [Line Items]
Mixed office and warehouse facility, square footage	50,724
Lease term	90 months
Lease expiration date	Dec. 31, 2018
Renewal options, number	2
Renewal options, term	3 years
Rent expense	$ 1,160,000	$ 1,287,000
Singapore [Member]
Operating Leased Assets [Line Items]
Mixed office and warehouse facility, square footage	20,000
Lease expiration date	Jul. 24, 2013
Other Subsidiaries [Member]
Operating Leased Assets [Line Items]
Lease expiration date	Sep. 30, 2013