Business Segment Information (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net long-lived assets and total assets held outside of the United States
Long-lived assets, net	$ 729	$ 417	$ 452
Total assets	158,843	150,306	150,194
United States [Member]
Net long-lived assets and total assets held outside of the United States
Long-lived assets, net	352	71	101
Total assets	150,315	142,694	148,180
Foreign Countries [Member]
Net long-lived assets and total assets held outside of the United States
Long-lived assets, net	377	346	351
Total assets	$ 8,528	$ 7,612	$ 2,014