Bank Borrowing Arrangements (Details) (Revolving Credit Facility [Member], USD $)	1 Months Ended
	Nov. 30, 2007	Mar. 30, 2014	Dec. 31, 2011
Line of Credit Facility [Line Items]
Borrowing capacity on revolving credit facility	$ 10,000,000		$ 12,500,000
Description of variable rate basis	LIBOR
Amount outstanding		$ 0
LIBOR [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.50%