Income Tax (Summary Of Activity Related To Unrecognized Tax Benefits) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax [Abstract]
Unrecognized tax benefits – gross beginning balance	$ 2,160	$ 2,171	$ 1,974
Gross increases – prior period tax provisions	194	(11)	197
Unrecognized tax benefits – gross ending balance	$ 2,354	$ 2,160	$ 2,171