Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements Of Comprehensive Income [Abstract]
Net Income	$ 18,157	$ 21,962	$ 31,549
Other Comprehensive Income (Loss):
Unrealized Foreign Currency Translation (Loss) Gain	(64)	95	(247)
Unrealized Holding Gain on Marketable Securities		(128)	(5)
Change in Fair Value of Derivatives	3,073	1,243	101
Change in Funding Status of Defined Benefit Plan	8,027	(2,209)	(5,998)
Comprehensive Income	$ 29,193	$ 20,963	$ 25,400